... ",2.5",3",3.5",4",4.5",and 6"pressure range:-6...0 mbar up to 0...400 barsocket:heavy ... :NPT,BSP,BSPT,PT,ZG,and other special specification availabletube/capsule material: 316 ss or copper alloycase: 304 ssbezel: 304 sswindow ... 55 degree centigrade;relative humidity below 80% dual scale diaphragm pressure gauge 0-30PSI