Seat: Concave upholstered seat with forward sloping edge and integral foam bumper guard. Seat measures 20.5" Wide. With 5/8" thick (9-ply) seat board. Nominal foam thickness 2" with 4" rearward angle.
Backrest: Backrest height adjustment feature allows for adjustment up or down 3", qucikly and securely (without the use of a noisy ratchet mechanism) Back measures 17.5" wide by 15" tall with 3/8 thick (5-ply) back board with 1/5" foam thickness. 4mm (5/32") thick polypropylene back panel with edge guard.
Base: Large, five legged, solid cast aluminium base with caster to caster diameter of 28.7" and maximum width of 27.4"
Seat Height: For Medium working heights such as desk and benches 32" to 34". Provides a range 20-27"
Casters: Two inches in height with dual soft wheels. Casters resist movement when the seat is unoccipied. Plastic collar around caster stem to match base. Standard Casters have grey tread.
Footring: Adjustable Footring: 22' Dia aluminum footring includes easy to operate hub-push down top of center bushing, adjust to desured height, and release to lock the foot ring into place , 22" flattened tubing ting is attached to the cast aluminium spokes with stainless steel screws, which utilize a t-cross section to provide a clean.
Armrests: Cast aluminium arm upright with arm adjustment mechanism and 3.5" wide x 9" long x 7/8" thick urethane arm pad. Arm pad can be adjusted in three dimensions: 3.5" vertically, 2" front to back and 1" left to right for a total armrest wisth adjustment of 2"
ISO Class 6 Clean Room Compatible