---
title: "Black Base, 5-Leg, Pneumatic Stool with Backrest"
date_modified: "2026-09-21T09:02:52-04:00"
---

               

Model #2135-21

##### Black Base, 5-Leg, Pneumatic Stool with Backrest

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- [Description](javaScript:;)
- [Specifications](javaScript:;)
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- [Color Chart](javaScript:;)

Model #2135-21

#### Black Base, 5-Leg, Pneumatic Stool with Backrest

- One-piece, American-made, Black, nylon base
- Full size diameter top and base for comfort and stability
- 5-leg design for greater stability
- Firm polyfoam padding
- Comfortable backrest
- 4" thick seat for extra comfort
- 2.5" dual wheel casters
- Single lever, pneumatic height adjustment
- All seats have 3/4" thick solid plywood base
- Premium, stain-resistant, woven, knit-backed, vinyl upholstery
- Knock-down design saves on shipping
- Easy, no tools required assembly
- Customizable with options
- 250 lbs. load capacity under normal use

Shipping info:

Weight: 23 lbs.  
Box Dimensions: 22"x23"x15"

[Download Data Sheet](https://cf.clinton-ind.com/doc/Specs/2135-21-Seating-2026.pdf) 

- [Imperial](javaScript:;)
- [Metric](javaScript:;)

2135-21 Black Base, 5-Leg, Pneumatic Stool with Backrest   Seat Diameter   Base Diameter   Height Range      2135-21 16" 24" 19" – 24"   2135-21 41 cm 61 cm 48 cm – 61 cm    

###### 22 Optional Foot Ring -Standard Series

• Height adjustable chrome ring with black hub

**Note:** Must order with Extra-Tall Cylinder so foot ring can be fitted onto stool

###### 23 Optional Glides B

Black only. Fits all nylon base stools.

###### 25 Soft-Roll Casters for Standard Series

**NOTE:** BLACK ONLY.

###### 26 Extra Tall Pneumatic Cylinder

• Adds 4.5" to low height and 7.5" to travel height

###### 28 Twin, Soft Wheel, Hooded Caster w/ Auto-Lock Occupied

• 2” (50mm) wheel diameter  
• 7/16” x 7/8” (11x22mm) wire grip ring stem  
• Locks when seat is occupied  
• Soft tread for hard floors  
• Black

###### 38 Twin, Soft Wheel, Hooded Caster w/ Auto-Lock Unoccupied

• 2” (50mm) wheel diameter  
• 7/16” x 7/8” (11x22mm) wire grip ring stem  
• Locks when seat is unoccupied  
• Soft tread for hard floors  
• Black

##### Related Products

###### Black Base, 5-Leg, Pneumatic Stool

Model #2135

[View](https://www.clinton-ind.com/product/2135-black-base-5-leg-pneumatic-stool) 

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