irocks T29 flagship engineering chair

https://www.youtube.com/watch?v=HT8pPKcbJfE Product specifications: • Series name: T29 • Chair type: Computer chair • Cloth material: elastic knitted fabric, suede fabric, three-proof coating • Color: black gray • Tray material: metal • Type of armrest: 4D armrest (up and down + left and right + front and back + rotation) • Seat type: Curved comfortable wide seat • Seat back type: Seamless 4-way adjustable lumbar mechanism (front, back, up, and down) • Chair back tilt angle: 90-141° • Cushion tilt angle: 15° (4-stage locking) • Air pressure rod: Class 4 (XIEQIANG) • Seat back material: high density PU foam 60 kg/m3 • Seat cushion material: high density PU foam 60 kg/m3 • Adjustable neck pillow: Yes, magnetic memory foam adjustable headrest • Chair leg type: Metal five-star chair legs • Wheel size and material: 60mm PU silent chair wheel • Self-assembly: Yes • Weight limit: 130 kg • made in China • Warranty: Two-year warranty for all chairs under normal use