Lorell horizontal Mesh Back Task Chair with synchro-tilt mechanism is designed with comfort and ease in mind. Seat covers in different colors are sold separately so you can personalize your chair to match your decor. Synchro-tilt mechanism allows the backrest and seat to tilt in unison. Back tilts more than seat and is also tension-adjustable. Task chair also features adjustable arms, seat slider and pneumatic gas lift for easily adjustable, seat height from 18-1/2" to 21-1/2". Breathable mesh back includes horizontal bands for tighter mesh and a different look. Fabric-upholstered, cushioned seat measures 19" wide x 19" deep. Arm height adjusts from 25" to 31" high. Weight capacity is 275 lb.