Static protection with advanced ergonomic features for total body support. Features: Large waterfall seat, and contoured backrest. Seat and back tilt with vertical back adjustment. Sturdy 5-leg polished aluminum base with conductive glides and drag chain. Pneumatic height adjustment, 360 swivel and 20" diameter adjustable chrome footring (on taller models). Heavy-duty conductive fabric with surface resistivity of 10(7x) Ohms/sq. Dimensions: Seat: 20"W X 18"D X 3"T; Back: 17-1/2W x 19H". Color, Black, Blue, Navy or Light Gray. (12-Year "Intensive Use" guarantee. Lifetime on pneumatic cylinder). (USA) Model 9351L: Vertical back adjustment 4"; Horizontal back adjustment: Tilt; Tilt: Seat: 6 degrees forward, 6 degrees rearward, Back: 11 degrees forward, 15 degrees backward.