These high quality 1/2" PEX Copper Crimp Rings are for 1/2" PEX piping. These rings are suitable for a variety off applications from domestic water to radiant heating. 

• Must use copper crimp tool. 
• Anodized with a black coating for a better resistance of corroding 
• Compatible with any brand of PEX manufactured to North American Standard (SDR-9 dimension standard)
• Do not use with PB tube - Only for PEX piping
• Manufactured to ASTM Standard F1807 & CSA B137.5
• Manufactured to STM Standard F2098
• High Quality Copper 
• Compatible with: Crimp and Cinch Ring Fitting Systems, PEX-A, PEX-B, PEX-C
• NOT Compatible with:  Expander Fitting System, Uponor/Wirsbo Expander System