Directly from One of the Biggest Pex Systems Manufacturers 10 Pieces PPSU Pex-A Expansion 3/4" X3/4" Full Port Ball Valve, ASTM F1960, Lead Free Made of Poly(PPSU), Better Performance than Brass Valve in RO, Chlorinated Water Application Compatible with all Types of Brands of Pex A Pipe/Tubing Expanding Connection Compatible with Expanding Fitting System, NOT Compatible with Stainless Steel Clamp & Copper Crimp Ring Systems; Need to Order Expander tool + Pex Sleeves / Ring Separately.