chair mechanism 1,make to accept gas lift 2,seat height adjustable 3,any angle tilt lockable chair mechanism1,make to accept gas lift2,seat height adjustable3,any angle tilt lockableItem:HYT-1351)Material: Steel2)Plate Thickness: 2.0mm3)Packaging: 50pcs/carton4)Carton size: 48x29x29cm5)N.W.: 0.42kg/pcs office chair mechanism