aluminum roller shutter hw001 type, 32mm wide,thickness:0.8mm,punching small holes. had 10 years in producing aluminum shutter aluminum roller shuttermaterial: aluminum alloy ... : from 0.5mm to 1.3mmalso provided with other components: pvc clide cap, cover, square end cap, bottom slat,guide rail ... ...our factory had 10 years experience in producing aluminum roller shutters..certificate: CE,ISO9001