... 3.material:ss304,316,316L 4.certificates:ISO9001:2008 ferrule welding union elbowFeatures:Thread: NPT, BSPT, BSPP, UNF.Connector Size: 1 ... steel 304 ,316 Tube O.D:6-32mm or 1/16"-1" inchTechnicsForgedThread StandardNPT,BSP,G,AN,PT,RP,ISO,etc ... service in 24hours.Call me ,let's talk more! ferrule & welding union elbow