This Ball Lock QD With Pressure Gauge and Adjustable PRV is a great accessory to have when performing pressure transfers. Made from stainless steel components for long-lasting quality. Features the Torpedo Keg gas-in disconnect and adjustable stainless gas pressure relief valve (D1833L). This model also features a pressure gauge that reads from 0-15 psi. Don't need the gauge? Check out the FIL42S.