Check the listing for details. 25 PCS EFIELD 1/2" Pex Straight Coupling Brass Crimp Fitting, Lead Free-NSF. Condition: New. Listed at 15.99 USD. 25 PCS 1/2" PEX x 1/2" PEX Insert Coupling Made from lead-free brass, complies with 2014 SDWA and is approved for potable water applications. PEX x PEX couplings are used to insert into and connect two PEX pipes together.Compatible with all types and brands of PEX Tubing: And the following connection systems:Crimp Connection System (PEX Crimp Tool + Copper Crimp Rings);Clamp (Cinch) Connection System (PEX Clamp Tool + Stainless Steel PEX Clamps).Standards & Certifications:Manufactured to ASTM standard F1807, certified for potable water applications (NSF 61-G), compatible with any SDR-9 (U.S. standard) PEX tubing.25 PCS 1/2" PEX x 1/2" PEX Insert Coupling Made from lead-free brass, complies with 2014 SDWA and is approved for potable water applications. PEX x PEX couplings are used to insert into and connect two PEX pipes together.Compatible with all types and brands of PEX Tubing: And the following connection systems:Crimp Connection System (PEX Crimp Tool + Copper Crimp Rings);Clamp (Cinch) Connection System (PEX Clamp Tool + Stainless Steel PEX Clamps).Standards & Certifications:Manufactured to ASTM standard F1807, certified for potable water applications (NSF 61-G), compatible with any SDR-9 (U.S. standard) PEX tubing.