Flash Furniture Mobile Ergonomic Kneeling Posture Task Chair with Back in Black Fabric Ergonomic Design Black Fabric Upholstery Padded Seat and Knee Rest Knee Rest Pad: 15.5''W x 11.5''D x 2.5'' Thick Pneumatic Seat Height Adjustment Heavy Duty Nylon Base Dual Wheel Casters CA117 Fire Retardant Foam Made In Taiwan TAA Compliant