1/2" Copper Tube Size x 1/4" Copper Tube Size, Compression Angle Stop Valve, Designed To Operate Above 10 PSI, Ideal For Remodeling & Repair Jobs, QickTite Fittings Ease Repairs & Retrofit Installations With No Specialty Tools Needed, Compatible With Zurn Pex Potable Non-Barrier Tubing, CPVC, Copper, & Polybutylene Piping, Requires No Special Tools, Solvents, Or Chemicals, Bagged.