... size:2",2.5",3",3.5",4",4.5",and 6"pressure range:-6...0 mbar up to 0...400 barsocket ... material:316 ss phosphor brassconnection way:back connection,bottom connection ,and clamp fixing,falaned fixing thread,hose etc.connection thread:NPT ... ,BSP,BSPT,PT,ZG,and other special specification availabletube/capsule material: 316 ss or copper ...