Homall Racing Gaming Chair Ergonomic High-Back Chair Premium PU Leather Bucket Seat,Computer Swivel Lumbar Support Executive Office Chair (Red) -Ergonomic design: strong metal frame designed to help promote a comfortable seated position. -Multifunctional: 360 degree rotating, enjoyable rocking function, be adjusted from 90 to 180 degree backwards, Height adjustable Seat, detachable headrest pillow and lumbar Cushion, all for an ideal seat. -Product dimensions: Back Measurements: 33"x15"(l x w), Seat Measurements: 19"x15"(d x w), adjustable Height: 17.5"-20.5". -Upgraded version: adjustable Armrest with Thickened padding, thick padded Back and Seat and upgraded tilt locking mechanism. -Homall Warranty: FREE replacement & refund in 30 days. Free replacement for installation problems, damage and missing parts in 12 months.