GTCHAIR 3 Levels Headrest Adjustment Home Office Ergonomic Mesh Task Chair

Specifications and material:  Dimensions: 31.5"×17.3"×26" (W×D×H) Color: black Plastic Shell: Black PA engineering plastic + glass fiber 30% Aluminum Part: ADC#12 polished strengthen aluminum 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 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 Function: Backrest: Height adjustable for 3 level in 4cm and backrest tilt can be locked in 15 positions within 33 degrees by arm paddle Lumbar Support: Height adjusted in 5cm Seat Height: Height is adjustable within 8 cm by arm paddle Seat Sliding:Seat depth adjusted within 5cm 5 levels Armrest: Height adjusted within 5 cm for 5 level and pivot in 3 directions within 28 degrees Mechanism: Backrest tilt tension adjusted by the rocking handle under the right side of the seat and laser coding for 5 years warranty S3-L Mesh Headrest: Rotation, angle and height adjustment Paddle Shift Wire Control System: The backrest tilt lock and seat height are controlled by mechanism via the paddle on the arm Shipping: Ships in 5-6 weeks