Dual Head Chuck Service Gauge, Maximum Pressure Of 160 PSI, Precision Engineered Service Gauges Provide Accurate, Long Life & Trouble Free Performance, Plated Brass Tube & 4 Sided Nylon Indicator Bar, Durable Hot Stamped, Not Pad Printed Indicator Bar, Precision Seamless Drawn Tube, Hang Up Loop, Measures 12-3/4".