Watts P-572 1/2-Inch Stainless Steel Cinch Clamp for 1/2-Inch PEX Pipe, 10-Pack 1/2-Inch stainless steel Cinch clamps 10/bag Interlocking ring that forms a complete 360-Degree watertight seal Made of corrosion-resistant annealed 304 stainless steel Connection can be verified visually-tab of Cinch Clamp is "pinched" Meets ASTM F-2098