OMS PVD Black Airstream C Regulator A-Clamp 1st Stage A13118004 The OMS High Performance Airstream Regulator First Stage is now available in a new C-Compact Light Weight version. Manufactured using Precision CNC machining and finished In PVD ? Physical Vapour Deposition Black, an additional process to create the highest level of tarnish, corrosion resistance & durability available. Traditional ?Tower? design, environmentally sealed, with Four Low Pressure 3/8? UNF & Two High Pressure 7/16? UNF Ports. In PVD ? Physical Vapour Deposition Black finish, an additional process to create the highest level of tarnish, corrosion resistance & durability available. A Great Regulator for any Diver & perfect for Sidemount. With A-Clamp ? INT Cylinder attachment Fitting for use up to 232 Bar. Weighs 0.76 Kgs.