we have pure bronze flange and bi-metallic flange,we also produce nibco flange,the material is CC491K and CC499K,bronze flange,bi-metallic flange,nibco bronze flange,gunmetal flange bronze flange,bi-metallic flange,nibco bronze flange,gunmetal flange Taizhou Runde Company , https://www.zjpressfittings.com Related News: Caterpillar Excavator New Products