XS Scuba Brass 2nd Stage Quick Disconnect with Brass Swivel2nd Stage Quick Disconnect with Brass Swivel Using the same brass coupler as the AC990, this product provides the additional benefit of adding a brass swivel to the male portion Installs between LP hose and 2nd stage, or full face mask The rotating swivel action reduces torque on the 2nd stage, leading to increased comfort Low pressure use only below 200 psi 2nd Stage Quick Disconnect with Brass Swivel Male Only Install on multiple 2nd stage