Dahl lead-free brass straight adapter with plated finish. 1/2" PEX pipe inlet port and 5/8" OD copper outlet port. Do not use PEX connections with polybutylene tubing. Do not use pipe dope or PTFE tape for compression on copper pipe. Lifetime warranty. Certified ASTM F1807, CSA(R), UPC(R), NSF/ANSI 61-G.