30 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:

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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.