 Made of quality stainless steel for durable construction.  With outstanding corrosion resistance to a wide range of environments.  Come with 8 holes for screws.  Designed for industrial use.  Stainless steel standard: GB12770-2002, GB/T 12771-2008, HG20537.3-1992, HG20537.4-1992, ASTM A312, ASTM A358, ASTM A790, ASTM A928, DIN 17458, EN10217 10216 & JIS G3461.  Rely on these stainless steel fitting to keep operations running smoothly. Contact: Tel:86-311-83886935 E-mail:sale3@jinmopipe.com Web:http://www.jinmopipe.com