SPECIFICATION: 1) Steel tube framework. 2) Multi-Stages with knob adjustor. 3) PU molding sponge. 4) Tricot pad. 5) Can be adjusted forward and back. 6) Adjusted angle from 90 degree to 180 degree. 7) Colors: red,blue,black,grey and yellow combination. Features: 1) Strong structure and safety. 2) Low weight. 3) Adjustable seat. 4) Pad cover: Fabric,PVC,PU,PK cloth and Leather.