Compatible with all Types Brands of Pex A Pipe/Tubing. Meet the Standard F1960. Certified to ANSI/NSF-61 and ASSE 1061 Product Standard. Need to Order Expander Tool + Pex Sleeves / Ring Separately. Pack of 5. Only for Pex A Pipe/Tubing Fitting Connection Compatible with all Types of Brands of Pex A Pipe/Tubing Meet the Standard F1960; Certified to ANSI/NSF-61 and ASSE 1061 Product Standard This Product is Compatible with Expanding Fitting System, NOT Compatible with Stainless Steel Clamp & Copper Crimp Ring Systems Pack of 5. Only for Pex A Pipe/Tubing Fitting Connection Need to Order Expander Tool + Pex Sleeves / Ring Separately