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By certification 
Brass Screw Fittings, made of DZR brass, meet the Australian/New Zealand Standard AS3688.Brass Screw Fittings, Brass Backnut Flanged, which has standard flanged and wide fanged, can connect male thread products, used for water system or gas system. Products size: S1/2FL, S3/4FL, S1FL, S1-1/4FL, S1-1/2FL and S2FL. Surface can be nickel plated or chrome plated.
High quality brass materials
Production method: finish machining after advanced hot forging crafts
Stcrit test method and quality control system
CE, SAI, AENOR, ISO 9001, ISO14001 Certificate; CSTB(Brass fitting) Certification and NSF/CSA (North America) are in process
http://www.jusenpipefitting.com/
