Perfect for connecting PEX to crimp type fittings in hard to reach spaces. Simply pinch the tab closed with the CinchTool to make the connection. CinchClamps are made from corrosion resistant annealed 304 stainless steel. (Meets ASTM F2098). Poly bagged. No. P 372: 3 8", 10 pack No. P 572: 1 2", 10 pack No. WP9S 08: 1 2", 100 pack No. P 772: 3 4", 10 pack No. WP9S 12: 3 4", 100 pack No. WP9S 16PB: 1", 10 pack