Shanghai Helen Metal Decoration Co., Ltd is a comprehensive advertising company which integrates design, R&D, production and sale. Through years of development,Our company has professional equipment and a good quality technical team. We aim at offering our customers the latest, professional and high quality products and excellent services. Our main products are Crystal Light Boxes, Aluminum Standoffs Fixings, Aluminum Frame Light Boxes, Ultra Slim Light Boxes, Cable & Rod Display Fixings, ...