1.Name:high-strength screw 2.Materials:PVC-U,PVC-C,PP-H, ... JIS, ANSI, BS 4.Certificate:CE, ISO9001:2008 1)Name: high-strength screw2)Materials: PVC-C,PVC-U,PP-H,PP-GF3 ... : DIN; CNS; JIS;ANSI;BS5)Certificate: CE, ISO9001:20086)High quality,Clear, light weight, rustless, oxidation-resistant, anti-corrosion and ... , engineering of Recycled water, Aquatic Culture, civil using Construction. high-strength screw