1.Driver's Seat,for all kinds of bus and truck ,such as Kinglong,Golden Dragon and Benz,volvo,Man. 2.The height adjustable scope: 60mm; 3.Fore/aft.adjustable scope: 120mm,each step:20mm; 4.The angle of the back cushion stepless adjustable range:40° 5.The deoscillator device travel:60mm; 6.The deoscillator device may execute stepless adjustment as per the body's weight between 50-120kg; 7.The angle of the head blocks adjustable scope:10°.