Features: 1) Materials: cold rolled steel sheet spayed by powder coating or full finish painting, polyurethane foam 2) Accessoires: reinforced hinges. Rubber Seal and rubber stripe 3) Color: white 4) Standard size: 3,500mm x 3,500mm x 40mm, other customized size is also negotiable 5) Component: opening operator, heavy duty slide rail, sealing hose, emergency lock, infrared protector, opening machine and remote controller Packing: plastic bag, strong carton