OMS 300 Bar DIN Cylinder Pressure Test Gauge A16910604 OMS Cylinder Pressure Testing Gauge with 300 Bar DIN G 5/8 Male Screw Fitting. For checking the contents of Cylinders fitted with DIN Type Valves on the Surface, may be used on cylinders with INT A-Clamp Valves using a Suitable Adaptor. With Dual Display, measures Pressure up to 300 Bar & 4300 PSI. Push Button Purge Vave for Pressure Relief after use. Weighs 0.3 Kg.