industrial door

our factory is professional in producing roling shutter windows and garage doors, we imported the automatic machine from south korea and Italy. so we can supply high quality products.pls see the following info: Features: 1) Outside is zinc-plated steel planks; high performance and rustproof 2) Thickness: 40/50mm 3) Door is steel/polyurethane/steel construction 4) Heat insulating coefficient: R=16.04, R=20.15 5) The U-tube rubber at the bottom along with the top and side seals are tight, keeping out wind, dirt and water 6) All the metal tightening parts are made of zinc-plated steel 7) Twisted spring can be used for more than 100,000 times 8) Glass window is made from toughened glass and organic glass 9) Advanced infrared ray protection device and safety protection device Outer packing: Cartons web: www.chinesedoors.com