... mounting6. Thread Connection: BSP, NPT, PT7. Standard: American, German, British, Japan, Chinese8. Material: carbon steel, stainless steel, brass9. Airproof/ Seal: NBR ... ,32,40,50,65,80mmJoin typethread,flange,manifold,mountingCertificateISO9001:2000StandardAmeican ,Japan,Greman,Chinese,BritishSurface disposalBlank-phosphoric polish (black), G-electroplated yellow ...