1 flame retardant PVC tarpaulin odorless knife cloth, odorless, environmentally friendly and durable long life, at least 10 years, other seckill coating cloth, Oxford cloth, waterproof canvas etc.. 2 skeleton more than 10 years, 10 years warranty, lifetime after sale 3 highly customized installation of 4. Compared to the door installation price is cheap, convenient for the user to remove and post maintenance. 5 factory direct sales, support goods than N home, reliable quality, durable materials