1/2" x 1/2" x 3/8", Low Lead, Push On Tee, Copper x Copper x Copper, Includes Insert For Pex Piping, For Tectite Fittings, Heat Free Method For Joining Copper, CPVC & Pex Tube, A Removable & Reusable Fitting System That Provides The Ultimate Flexibility In Plumbing System Assembly.