QICKCLAMP 3/4"RING 100PK by ZURN PEX MfrPartNo QCLP4XNPK100 Compatible Pipe Material: Copper, CPVC and Polybutylene Fits For: use with Polybutylene, CPVC and Copper tubing Application: For Plumbing and Heating Material: Stainless Steel End 2 Diameter: 3/4 in.