BenchPro Deluxe Polyurethane Chair/Stool with Nylon Base and Footring, 450 lbs Capacity, 18.5" Width x 18" Depth, 23"-33" Seat Height, Black, 1 Lever Control Ergonomic feature: high mobility hand grip slot, built in lumbar support, front waterfall seat design and adjustable armrest 450 lbs weight capacity; independent seat and back tilt adjustment No tool required, 5 minutes assembly 15 year unconditional warranty, top to bottom coverage, no-hassle process Nylon Base