... dual range scale dry pressure gauge bottom brass connection diameter:1.5",2",2.5",3",4",6". Black Steel Case Dual ... Scale Dry Pressure Gauge 1. Diameter: 1 ½", 2", 2 ½ ",3",4 ... ",6";2.Case: black steel case;3 ... Connection: bottom connection, center back male connection;7.Range:0~10,000psi;8.Scale:psi,bar, Mpa, ...