Sold as 1 Each. Drafting Stools. Seat Dimensions: 23.5' - 31.5'H x 19.5'W x 18'D. Assembly Required. Mid-Back Design with breathable mesh material. Contoured Light Gray Mesh Upholstered Seat with CAL 117 Fire Retardant Foam. Color: Light Gray Mesh/Black Frame; Material: Foam, Mesh, Metal, Plastic, Plywood, Polyester. Back Dimensions: 15'W x 21'H. Rated for Commercial Use. Curved back with lumbar support. Pneumatic Seat Height Adjustment. Ergonomic. Arm Height: 7.5' - 10'H. 5 Year Limited (non moving metal parts) 2 yr Parts. Tilt Lock Mechanism rocks/tilts the chair and locks in an upright position. Height Adjustable 20' Round Chrome Foot Ring. Overall Dimensions: 25.25'W x 24.5'D x 41.5' - 49.5'H. Weight Capacity: 250 lbs; Recommended Usage: 6-8 Hours. Contemporary Drafting Stool with Height Adjustable Padded Arms. Tilt Tension Adjustment Knob adjusts the chair's backward tilt resistance. 5-Star Nylon Base with Dual-Wheel Casters.