Product information:●Seat cushion: Breathable network cloth High density Rebound sponge.●Armrest:Fixed armrest.●Chassis: Plus thick Explosion proof Chassis.●Gas pressure bar: SGS Certification Gas rod.●Chair base: chrome base.●Wheel: PU Wrapped wheel.●Total Dimensions: 60x 60 x 83- 93cm.●Seat Back Height: 50cm.●Seat Height: 41cm - 51cm.●Seat size: 48cm x 50cm .●Total Height: about83-93cm.●Colour: Orange , Black , Blue , Green , Red●Max. capacity: 150kg/330lb●Function: 360 degrees Rotate/10cm Rise and drop/Can't tiltSeat Height Adjustable!Fully adjustable seat height, back height;Easy to assemble and maintain!Super reliable and Durable!Elegant chrome metal base and gas lift design!Very vomfortable!It can be used in your office, house no matter for conference or daily use.Package Includes:● Ergonomic mesh office chair● Installation manual● Hardware partsNote:1.Due to different measurement methods, the measurement error of 1-2 cm is a reasonable range.2.If you have any questions, please feel free to contact us, we promise to get back to you as soon as possible, and give you a satisfactory solution.