Ergonomic Office Chair with Headrest Adjustable Height for Home Office and Study, Black uses the supplier-listed furniture details for home setup. Sturdy 5-point metal base provides excellent stability and support SGS-certified gas cylinder helps provide steady and reliable height adjustment 360degree(s) smooth universal wheels allow easy movement and flexibility 102degree(s)-122degree(s) rocking backrest function promotes relaxation and reduces back strain Elastic sponge filling offers long-lasting comfort and cushioning Key listed specifications include material: Plywood Faux Leather Nylon Sponge Cotton Non-Woven Fabric Metal dimensions: 27.5" x 26" x 45"-49" (L x W x H) Headrest seat height: 18"-21" capacity: 242 lbs weight: 37.5 lbs package includes: 1 x Office Chair 1 x Instruction.