Boss Diamond Task Chair In Black Antimicrobial Vinyl W/ Adjustable Arms

Model: B9091-CS

UPC: 751118909180

This mid back ergonomic task chair is the perfect way to increase productivity and remain comfortable while doing so. Its contoured back seat promotes proper posture that prevents back strain, while its extra large seat and back cushions ensure maximum comfort. Additional features include adjustable arms, pneumatic gas lift seat height adjustment, black antimicrobial vinyl upholstery, and adjustable back height and depth. It is available in four colors, so there are plenty of options for matching your existing color scheme.


  • Back Adjustment: No
  • Arm Type: Adjustable
  • Mechanism Type: Height Adjustable
  • Infinite Lock: No
  • Knee Tilt: No
  • Tilt Tension: No
  • Pneumatic Gas Lift: Yes
  • Upright Lock: No
  • Seat Slider: No
  • Weight Capacity: 275 lb
  • Chair Base: Nylon 25 Inch
  • Casters: Dual Wheel Nylon 2 Inch

Additional information


Designed and manufactured to reduce chemical emissions to the indoor environment.

CA TB117-2013

Fabric, mesh and molded foam are certified by the fire-retardant standard of CA TB117-2013.

Material & Color

  • Material: Antimicrobial Vinyl
  • Color: Black
  • Fabric Code: FP-0215

Product Dimensions

  • Product Width: 25″
  • Product Depth: 25″
  • Product Height: 32″
  • Max Product Height: 40″
  • Back Height: 16.5″
  • Back Width: 17″
  • Seat Depth: 18″
  • Seat Width: 20″
  • Seat Height: 17″ -22″ H
  • Arm Height: 24″-32″ H

Package Details

  • Shipping Length: 24″
  • Shipping Width: 11″
  • Shipping Height: 23″
  • Shipping Weight: 34 lb
  • Cubic Feet: 3.51
  • Freight Class: 175

Assembly instructions

Assembly Video

Product Features Video