Brand Name: SharkBite End 1 Diameter: 5/16 in. End 2 Diameter: 1/4 in. Product Type: Coupling Packaging Type: Bagged Push to Connect: Yes OD: 5/16 in. x 1/4 in. * ID: 3/16 in. x 1/8 in. * Polly alloy is an efficient way to join multiple different materials with no specialty tools, solder, unions or glue required* These fittings are lead-free compliant, corrosion resistant, and are compatible with PEX, polyethylene, nylon, polyurethane, copper