... competitive products of our company, welcome to contact with us Curtain side rail (truck and trailer parts) material: Aluminium alloyCurtain ... . Our main products: Reflective material, door seal, marker light, roll-up door, door lock system, side board door lock system ... over cent buckle, fittings, roll up doors etc. All products can be used in semi-trailer, side curtain trailer, container, tipper etc ...