Medium bench height chair w/weight-activated control, synchronous seat & backrest, black vinyl, seat 20.5in w w/16.4-18.9in adj depth; backrest 17.5in w x 15in h w/3in adj range, 3-way arms, 28.7in dia solid heigh
Desk height chair w/weight-activated control, synchronous seat & backrest, black vinyl, seat 20.5in w w/16.4-18.9in adj depth; backrest 17.5in w x 15in h w/3in adj range, 3-way arms, 28.7in dia solid cast aluminum base
Medium bench height chair and backrest angle, black vinyl, seat 20.5in wide set to 18in depth, backrest 17.5in w x 15in h w/ 3in adj range, no arms, 23in dia tubular dual-wheel casters; seat height 20.5-27.5in; IS
Medium bench height chair, backrest angle; black vinyl, seat 20.5in wide set to 18in depth, backrest 17.5in w x 15in h w/ 3in adj range, no arms, 22in dia. Aluminum foot ring 28.7in dia, seat height 19-28.5in; ISO
High bench height chair with task control to regulate height and backrest angle, black vinyl, seat 20.5in wide set to 18in depth, backrest 17.5in w x 15in h with 3in adj range, no arms, 23in dia tubular steel base with affixed 21in dia, height 24.5-31.5in; ISO 7 rated