Get top performance and enjoy a larger saddle-shaped seat and backrestand choose the upholstery, bases, armrests, casters and glides that suit your environmental and budget needs. Features Saddle-shaped seat is 21" wide x 19" deep x 3" thick Backrest 18" wide x 19" high with full lumbar support Soft-touch pneumatic seat-height adjustment, rearward seat tilt, backrest tilt and height adjustment Optional: Static Control seating with ESD upholstery—Clean Room rated to Class 1/ISO Class 3