<p>XISHE Ergonomic curved mid back office chair is designed specially for the comfort of professionals. Backrest is slightly curved inwardso that it can perfectly fit your body shape and give you the most comfortablesupport. No more fatigue after long hours of working or gaming. This officeswivel chair comes with all hard wares and necessary tools. It took may 10~15minutes if following the manual instruction.</p> <p>Free replacement or money back for quality reason withinone year, lifetime warranty on frame. We are always providing excellentafter-sales service here.</p> <p>With the professional invention team and advanced productionline, XISHE is concentrating on providing the best gaming experience for ourworldwide customers.</p> <p><b>Specification:</b></p> <p>-Class 4 gas lift & aluminum base</p> <p>-360 degree smooth-rolling casters</p> <p>-Tilt locking mechanism with adjustable backrest angle (90°-120°) </p> <p>-Rocking mechanism with up to 30° of seat tilt</p> <p>-Load capacity 300 lbs</p> <p><b>Dimension:</b></p> <p>-Product Size (Backrest):20.5"X 22.3"(W x H)</p> <p>-Product Size (Seat):20.5"X 20.5"(W x D)</p> <p>-Seat adjustable height: 16.6"-20.5"</p> <p><b>Package Includes:</b></p> <p>-1×Office chair</p> <p>-1×Installation instruction</p> <p>-1×Hardware accessories set</p> <p>-1×After-sale service card</p>