4u chairs
finally, a chair 4u
discover 4u
4u is a cutting edge Italian seating series designed by S.I. Design. The flowing sleek lines of this chair add to the ambiance of sophistication in any environment while also providing incredible ergonomics, comfort, and functionality. A range of back offerings in mesh, upholstered, or the newest, welded fabric “groove”, which is a sleek and comfortable hybrid of both mesh and fabric. Both white and black frames are available with matching arms and bases. There are 8 arm choices including 6-way adjustable armrest—angle, width and height adjustments—and 3 controls including body balance and synchro options enabling you to customize to your exact needs. 4u also offers 2 seat sizes and two seat shape options with the Euro sit and the comfort sit both available. Also available as task stools.
There’s no doubt about it. This chair is 4u.
features
- mesh back: 4-way elastomeric stretch mesh encased in 3 colors with optional adjustable lumbar.
- upholstered back: beautiful sleek upholstered back version with integrated, adjustable lumbar standards.
- groove back: 7 colors of welded fabric provide an incredibly comfortable hybrid between mesh and upholstered back.
- seat: offering two distinct seat styles—original slim line design with seat pan and new extra comfort seat with extra height in the cushioning of the seat.
- control mechanisms: featuring quick adjust advanced synchro that uses single rotation adjustments for the back (no endless turning of the handle to adjust your backrest to your level of comfort). Simple body balance and enhanced body balance options.
- arms: multiple height and width adjustable options and a fixed, conference arm.
- bases: five-star bases available in black nylon, polished aluminum, brushed aluminum and powder coated white aluminum to match the white frame finishes.
- quick ship: 20 chairs produced in a 48 hour period.
- warranty: 12 year warranty including the foam, 5 for mesh & groove.
certifications
participating in
statement of line
slim line mesh back chair
slim line mesh back stool
extra comfort mesh back chair
extra comfort mesh back stool
slim line groove back chair
slim line groove back stool
extra comfort groove back chair
extra comfort groove back stool
slim line upholstered back chair
slim line upholstered back stool
extra comfort upholstered back chair
extra comfort upholstered back stool
color options
Click the plus sign next to a category below to see all of its options.
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frame finishes
matte black
matte white
-
mesh colors
black
charcoal
stardust
-
groove colors
black
dark grey
light grey
taupe
navy
green
red
component options
Click the plus sign next to a category below to see all of its options.
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armless standard
armless
-0A
-
adjustable arms
4u custom height adjustable arm
-33A (black) | 35A (white)
Features a 6D height adjustable arm custom to the 4u series that offers the following adjustments:
- Arm moves up and down.
- Permanent armrest rotates in 15°, out 15°.
- Permanent armrest slides out 1.5″, slides back to resting position.
height adjustable arm
-38A (black)
Features a 2D to 4D height adjustable arm that offers the following adjustments:
- Arm moves up and down.
- Optional arm width adjustment bracket extends each arm 2.0″ away from the sides of the chairs and back to the resting position.
Preferred armrest:
6 cap
roll back arm
-39A
Features a 4D height adjustable arm that offers the following adjustments:
- Arm moves up and down.
- Smooth roll back feature where the arm can be fully rolled back out of the way to easily slide in and out of the chair.
Preferred armrest:
6 cap
8-way adjustable arm
-51A (black) | 52A (white) | 53A (polished aluminum)
Features a 2D to 8D height adjustable arm that offers the following adjustments:
- Arm moves up and down.
- Optional armrest rotates in 15°, out 15°.
- Optional armrest slides out 1.5″, slides back to resting position.
- Optional arm width adjustment bracket extends each arm 2.0″ away from the sides of the chairs and back to the resting position.
- Optional upholstery can be added on static armrest 20S & and 4D rotating armrest 20R.
Armrest choices include:
20S static cap is fixed
20R rotating cap- Both armrests are available with option of upholstery. The 20R example above shows upholstery applied.
open the use guide here →
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fixed arms
fixed conference arm
-46A
- Permanent armrest is fixed.
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body balance control mechanisms
basic body balance
-66C
1 seat height adjustment – Adjust the seat height by lifting the paddle (located just below front, right corner of the seat cushion). Proper seat height is realized when the top of your legs are somewhat parallel to the floor.
2 back tilt lock adjustment (5 position) – Push the button. Use your back to lean against the back of the chair, pushing with your back to your desired angle. Feel/hear a click as you reach different angle lock positions. Adjusts to 5 different back angles.
open the use guide here →
basic body balance with seat slide
-66C-12SS
1 seat height adjustment – Adjust the seat height by lifting the paddle (located just below front, right corner of the seat cushion). Proper seat height is realized when the top of your legs are somewhat parallel to the floor.
2 back tilt lock adjustment (5 position) – Push the button. Use your back to lean against the back of the chair, pushing with your back to your desired angle. Feel/hear a click as you reach different angle lock positions. Adjusts to 5 different back angles.
3 optional seat slider (-12SS) – Pull up on paddle while shifting your weight forward to move your seat forward or backward to move your seat back.
open the use guide here →
enhanced body balance
-68C
1 seat height adjustment – Adjust the seat height by lifting your weight out of the chair and pulling up on the paddle. Proper seat height is realized when the top of your legs are somewhat parallel to the floor.
2 back tension adjustment – Rotate to the front of the chair to increase back tension. Rotate to the back of the chair to decrease back tension.
3 tilt limiter – Rotate all the way to the front of the chair to lock the back in the upright position. When rotating back, you will hear a click, this represents a limited range of tilt – still in active seated position, another click back, allows user to transition from passive to active seated position, and one more click back, provides access to full range of motion.
open the use guide here →
enhanced body balance with seat slide
-68C-12SS
1 seat height adjustment – Adjust the seat height by lifting your weight out of the chair and pulling up on the paddle. Proper seat height is realized when the top of your legs are somewhat parallel to the floor.
2 back tension adjustment – Rotate to the front of the chair to increase back tension. Rotate to the back of the chair to decrease back tension.
3 tilt limiter – Rotate all the way to the front of the chair to lock the back in the upright position. When rotating back, you will hear a click, this represents a limited range of tilt – still in active seated position, another click back, allows user to transition from passive to active seated position, and one more click back, provides access to full range of motion.
4 seat slider (-12SS) – Pull up on paddle while shifting your weight forward to move your seat forward or backward to move your seat back.
open the use guide here →
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synchro control mechanisms
quick adjust advanced synchro
-67C
1 seat height adjustment – Adjust the seat height by lifting your weight out of the chair and pulling up on the paddle. Proper seat height is realized when the top of your legs are somewhat parallel to the floor.
2 single rotation back tilt lock adjustment (5 position) – Tilt the seat back to desired angle and twist slightly. To unlock, twist the other way, leaning back to unlock. The turn is smooth. All tilt lock angles can be reached within a single turn of the handle.
3 back/recline tension adjustment – Rotate knob right to increase tilt tension. Rotate knob left to decrease tilt tension. Rotate within a single rotation of the knob to achieve any of the 7 distinct back tension levels.open the use guide here →
quick adjust advanced synchro with seat slide
-67CSS
1 seat height adjustment – Adjust the seat height by lifting your weight out of the chair and pulling up on the paddle. Proper seat height is realized when the top of your legs are somewhat parallel to the floor.
2 single rotation back tilt lock adjustment (5 position) – Tilt the seat back to desired angle and twist slightly. To unlock, twist the other way, leaning back to unlock. The turn is smooth. All tilt lock angles can be reached within a single turn of the handle.
3 back/recline tension adjustment – Rotate knob right to increase tilt tension. Rotate knob left to decrease tilt tension. Rotate within a single rotation of the knob to achieve any of the 7 distinct back tension levels.
4 seat slider – Pull up on paddle while shifting your weight forward to move your seat forward or backward to move your seat back.open the use guide here →
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task stool control
stool control
-35C
1 seat height adjustment – Adjust the seat height by lifting your weight out of the chair and pulling up on the paddle. Proper seat height is realized when the top of your legs are somewhat parallel to the floor.
2 back lock adjustment (single position) – Use the same paddle as you use for the seat height adjustment. To lock the chair in an upright position, shift your weight forward until the chair is in an upright position, then push the button in. To rock (free float) shift your weight forward and push the button again.Pair with the tall (-11DR) or extra tall (-11XDR) gas lift with stool foot ring.
open the use guide here →
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adjustable lumbar
optional lumbar on 4u mesh & 4u groove
-LS4B (black) | -LS4W (white)
- Option on mesh and groove backs.
- Offers height adjustable lumbar as an option i.e. “vertical adjustment” with 2.3″ of travel.
- Adjusts independently from the back.
- Allows the user to promote the natural, forward curve of his/her lower back.
- Promotes an optimal sitting position and the opportunity to maintain this posture throughout the entire work day.
integrated lumbar on 4u upholstered
included
- Integrated into upholstered backs.
- Adjusted through a tiny, black handle located on the right side of the back of the chair.
- Offers height adjustable lumbar as an option i.e. “vertical adjustment” with 2.3″ of travel.
- Adjusts independently from the back.
- Allows the user to promote the natural, forward curve of his/her lower back.
- Promotes an optimal sitting position and the opportunity to maintain this posture throughout the entire work day.
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bases
black nylon 26" 5-star
-18BB
powder coated white aluminum 26" 5-star
-18WB
polished aluminum 26" 5-star
-18PB
brushed aluminum 26" 5-star
-18BA
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stool bases
black nylon 26" 5-star with footring
-18BB-11DR | -18BB-11XDR
Stool Height 11DR: 20 in – 27 in
Extra-tall Stool Height 11XDR: 23 in – 33 in
powder coated white aluminum 26" 5-star with footring
-18WB-11DR | -18WB-11XDR
Stool Height 11DR: 20 in – 27 in
Extra-tall Stool Height 11XDR: 23 in – 33 in
polished aluminum 26" 5-star with footring
-18PB-11DR | -18PB-11XDR
Stool Height 11DR: 20 in – 27 in
Extra-tall Stool Height 11XDR: 23 in – 33 in
brushed aluminum 26" 5-star with footring
-18BA-11DR | -18BA-11XDR
Stool Height 11DR: 20 in – 27 in
Extra-tall Stool Height 11XDR: 23 in – 33 in -
casters & glides
black carpet casters
-16HP
grey hard floor & carpet casters
-16SCG
black glides
-16GL
Downloads
pricing
| 4u price list and specification guide | (4.03 MB) |
brochures
| 4u Mesh brochure | (905.29 KB) | |
| 4u Groove brochure | (1.13 MB) | |
| 4u Upholstered brochure | (635.12 KB) | |
| higher education solutions book | (23.77 MB) | |
| healthcare solutions book | (15.64 MB) |
postcards
| 4u postcard 5x7 | (501.13 KB) |
symbols
| 4u 2D autoCAD files | zip | (4.8 MB) |
| 4u 3D autoCAD files | zip | (38.51 MB) |
| 4u revit files | zip | (3.55 MB) |
certifications
| BIFMA LEVEL 2 task chairs certification | (114.76 KB) | |
| Clean Air Gold certification | (383.11 KB) |
care
| 4u cleaning and care guidelines | (112.58 KB) |
instructions
| base to chair assembly instructions | (308.35 KB) |
user-guides
| 35C swivel tilt for stool control use guide | (89.83 KB) | |
| 66C-12SS body balance control & seat slide use guide | (184.88 KB) | |
| 66C body balance control use guide | (183.31 KB) | |
| 67C quick adjust advanced synchro control user guide | (194.7 KB) | |
| 67CSS quick adjust advanced synchro with seat slider | (205.23 KB) | |
| 68C enhanced body balance and seat slide control user guide | (196.65 KB) | |
| 68C enhanced body balance control use guide | (195.24 KB) | |
| 33A & 35A 4u height adjustable arm use guide | (173.69 KB) | |
| 38A arm use guide | (195.28 KB) | |
| 39A roll back arm use guide | (184.56 KB) | |
| 51A, 51AG, 52A, 53A adjustable height arm use guide | (199.07 KB) | |
| 4u upholstered integrated adjustable lumbar support | (181.6 KB) | |
| 4u mesh adjustable lumbar use guide | (182.59 KB) |