OMS 50mm Stage Pressure Gauge Bar A14118001 OMS Lightweight & Streamlined 50mm SPG � Submersible Stage Pressure Gauge the perfect Contents Guage for use with Stage Cylinders. With White Highly Visible Phosphorescent Face with Black Numbers, the Critical Low Pressure Area is marked in Red providing easy reading of Cylinder Pressure. High Density Polymer Lens & Lightweight Low Profile Body with Over Pressure Safety Releif Valve . Supplied with Standard Shoulder Type Swivel Pin for fitting to High Pressure Hoses with 7/16� UNF Female Fitting. 0 to 360 Bar Display, Compact Sized 50mm Diameter Face. Weighs only 0.12 Kg.