... size 4,have a long history screw truss,hose truss.aluminum truss,roof trussMaterial size details ... : 150*150mm,200 * 200mm,300*300mm, 400*400mm ,300*400mm etc.screw ... round frame, arc frame Color: Optional.Connection: screw or boltCanopy:sun canopy ,rain canopy. no ... number is 0086-13662486584. screw truss,hose truss.aluminum truss,roof truss