Snapklik.co : 60 Pack 3/4 Inch PEX Crip Rings, Preiu 304 Stainless... Made of corrosion-resistant annealed 304 stainless steel 1/2 Inch Pex Crimp Rings 3/4 Pex Crimp Rings 50-Pack 3/4 Inch PEX Cinch Clamp Rings – Stainless Steel For Plumbing (Rust-Proof) Irwin Clamps Pex Clamps Cheap Promo for IWISS 1/2-Inch Stainless Steel Cinch Clamp Pinch Rings... For use with PEX or PE-RT pipe. Perfect for connecting PEX to crimp type fittings in hard to reach spaces Safe for potable water and radiant floor heating For use with brass or poly PEX crimp fittings. They come in sizes from 1/2 inch to 1 inch with clamp size corresponding both to the pipe and fitting size, for example, 1/2 inch clamps for 1/2 inch PEX tubing and fittings, 3/4 inch - for 3/4 inch pipe and fittings and so on Due to their heavy-duty 304 series steel construction as well as their step-less design and uniform compression sealing, these cutting edge clamps were designed primarily for PEX piping and PE-RT tubing.