Specifications high quality, good resistance to racking, good chemical resistance, passed ISO9001:2000 Specificationshigh quality, good resistance to racking, good chemical resistance, passed ISO9001:2000 Our equal elbow have 4 colors, that is ,milk-white, china-white, green and grey. Our product owns 9 sizes, i.e.,D20, D25, D32, D40, D50, D63, D75, D90 and D110. Our product is made of selected ...