... .5",3",4",6". Black Steel Case Dual Scale Dry Pressure Gauge 1. Diameter: 1 ½", 2", 2 ½ ",3",4",6";2.Case: black ... thread:1/8", 1/4", 3/8",1/2",NPT,BSPT,BSP;6.Connection: bottom connection, center back male connection;7.Range:0~10,000psi;8.Scale ... :psi,bar, Mpa, Kpa, kg/cm2,Hg Single or dual scale or according to customers order ...