Pneumatic Drafting Black Backless Vinyl Saddle Seat stoolThe ergo-molded saddle seat of the Backless Drafting Stool provides perfect support when leaning forward continuously at a task. Lever-operated pneumatic seat height adjustment and seat angle adjustment allow you to find an exact height and tilt, while a standard five-wheel caster base offers full freedom of movement.Features: • Drafting Stool features an ergonomically molded saddle seat • Drafting Stool features lever-operated pneumatic seat height adjustment • Seat angle adjustment knob • 5-wheel caster base • Height Adjustment 19" to 24" • For commercial useSpecifications: • Chair Dimensions: 22.5"W x 22.5"D x 19.63"H • Chair Weight: 17 lbs • Chair Weight Capacity: 250 lbs • Seat Dimensions: 16"W x 11.13"D x 1.5"T • Seat Height: 18.25" - 23"