OMS SPG 63mm 360bar The OMS Stage Gauge is lightweight and compact, perfect for stage and deco bottles or lightweight travelling reg sets. OMS submersible pressure gauges (SPG) come with the necessary “O” ring swivel for installation. These gauges are light, small and perfect for stage bottles or people that are just looking for a smaller gauge.Features:Available in Bar or PSIAvailable in 2 sizes: 2" / 50.8mm or 2.5" / 63.5mmHigh Contrast Face designed for easy viewing in low light situationsBrass HousingNickel finish