Anji Mid Back Armless Leather Computer Office Desk Chair Padded seat with thickly padded back provide all-day support and comfort. Built-In Lumbar Support, Seat height adjustment allows you to adjust it to your needs. 360-degree swivel; Dual Smooth-rolling Nylon Wheel casters Overall size: L 22.4" x W 22.8" x H 34.3-38.6"; Seat size: L 18.1" x W 16.9" x T 2.8"; Back size: H 23.2" x W16.9" x T0.8" Gaslift have passed the BIFMA testing standards; Assembly instructions included