McMaster 4004K63 Dual Scale Pressure and Vacuum Gauge with Steel Case, 2 1 2" Dial Diameter, 1 4 NPT Bottom Connection, 0–100 psi 4AAA3 Includes Nut No Includes Nut No 600 lbf Includes Adapter Kit for Slope Descent with Manual Breaking Trolley Standards ANSI Z359 Line Material Steel Color Blue Rescue Mode Lower Brand and Series 3M DBI SALA Rollgliss Series Rollgliss Workers per System 1 Harness End Connection Snap Hook Operation Mode Manual Includes Rescue Pole No Descent Type Sloped Kit Includes Suspension Bars of Hg 5 kPa 20 Numeric Increments psi 10 in Vacuum For Use With Air Display Type Dial Dial Type Dry Dial Diameter 2 1 2" Pipe Size 1 4 Scale Type Dual Scale psi