the features of PVC products: 1, heat preservation performance; 2, sounth insulation; 3, anti-aging; 4, retarde combustion; 5, impacut-resistant; 6, good water-proof; 7, easy to maintain; 8, corrosion-resistance; 9, good air-proof; 10, anti theft; 11, scientific design; 12, widely use & potential foreground.