Brass push fitting. UPC, IAPMO, and NSF 61 certified and approved. The fitting can be used with copper, PEX, and CPVC, and is rated at 200 F., 200 P.S.I. It is made of 1 piece DZR brass, which is a noncorrosive, low lead material. Fittings can be buried and placed behind drywall. Fittings are removeable and reuseable. Product is individually bagged.