1.Framework structure for vegetable greenhouse for tomato: Hot galvanized steel,this kind of steel has good anticorrosion and antirust effects,which can help extend the service life of the greenhouse. 2.Cover material for vegetable greenhouse for tomato: Mono-layer or bi-layer float glass&tempered glass; This float glass production molding process is completed in the tin tank with the gas(H2 , N2). And excellent light transmittance rate about 90%. In addition, it has better resistance and UV compartment capacity. And low thermal expansion and contraction coefficient. So with all those features, this kind of glass could last 25 years for service.