Detailed Product Description 1) Male and female ompression coupling.2) Conform to ASME, ANSI, JIS, DIN.3) Passed GB/T9001-2000, ISO9001-2000, ISO14001, CJ/T111-2000 standard.4) Through advanced hot forging and cold maching process.5) All the items supplied are made of the best quality material.6) 20 years experience in manufacturing and exporting this product.