Working on a PEX plumbing project? You'll need these reliable cinch clamp rings. This pack gives you 50 rings, all sized for 5/8 inch PEX tubing (that's an inner diameter of about 20.8mm). They're made from high-quality 304 stainless steel, which means they're resistant to rust and corrosion, perfect for both hot and cold water lines in your home's plumbing, radiant heating systems, or even some industrial applications. They meet the ASTM F2098 standard, so you know they're good quality. They work with all major brands of SDR-9 PEX pipe. Installation is straightforward with the right cinch clamp tool: slide the ring onto the pipe, push the pipe onto the fitting, and squeeze the tool to crimp it tight for a strong, leak-proof seal. The interlocking design and 360-degree compression make the connection super secure. Whether you're a DIY homeowner or a professional plumber, having a bulk pack of these on hand is super convenient and cost-effective for any repair or installation job.