1. Body Material: brass. 2. Probe:Brass 3. With pressure relief valve 4. Surface: nickel plated Keg coupler,S12-1Ni1. Body Material: brass.2. Probe:Brass3. With pressure relief valve 4. Surface: nickel plated.5. Type available: D, S, A, M, G, L,U, bespoke types are acceptable.Welcome OEM order U style beer keg coupler