Zorn QuickTime, 1/2" Thread x 3/8" Nominal Tube Size, Nut Ring Cone Set, Ideal For Remodeling & Repair Jobs, Can Connect To A Variety Of Plumbing Such As Galvanized, Copper, CPVC, & Polybutylene, Requires No Special Tools, Solvents, Or Chemicals, Bagged.. The product is manufactured in China. The product is easy to use and highly durable.