Average Lead Content: Lead Free | Brand Name: Mueller Streamline | Compatible Pipe Material: Copper | End 1 Diameter: 1 1/2 in. | End 1 Type: Sweat | End 2 Diameter: 1-1/2 in. | End 2 Type: Sweat | Material: Copper | Number in Package: 1 pk | Underground Rated: Yes 11/2 CXC CPLG W/ST. Used to join two pieces of copper pipe together. High quality copper construction designed for water supplies. Perfect for commercial and residential potable water systems | Copper x Copper | Coupling allows two pieces of pipe to be joined. With stop.