... There is a rubber cover dustproof protection for the suspending device on the seat chassis to prevent sewage and dusts.seat ... disassembled.Technical datas1,The adjusting scope in the front and back: 150mm2,The adjustable value for height of the seat is 60mm ... 4,the travel distance of the suspending device is 80mm5,The speedless adjustment can be made in according to the weight of the people between ...