GTCHAIR 3D Dynamic Back- Lumbar Support Games Ergonomic Task Chair

Specifications and material:  Dimensions: 31.5"×17.3"×26" (W×D×H) Color: black / gray Plastic Shell: Black PA engineering plastic + glass fiber 30% +Y backrest frame: Metallic Grey Paint Baked or Black Paint Baked Aluminum Part: ADC#12 polished strengthen aluminum alloy Back(Headrest) Cover: High elastic Korean Wintex GT Mesh Lumbar Support: High density foam pad upholstery Seat: High elastic Korean Wintex GT Mesh Armrest: Paddle shift wire control, PA Engineering plastic arm frame + glass fiber 30%, PU cover Mechanism: 60Si2Mn Double Spring Paddle Shift Wire Control Mechanism, aluminum shell with texture baking finish, anti-corrosion and abrasion resistant Gas Lift: Customized Korea Samhongsa class IV 85mm drive, load-bearing 250kg Base: BIFMA Certified 350mm ADC12# polished aluminum base with reinforce rib and noise reducing caps inside Casters: BIFMA Certified 65mm black PU casters, rolling test for 100,000 times Bolts: Grade 12.9 hyper-strength bolts in key parts Function: Back