Oatey Insulated and Suspend Clamp allows pipe to be secured to joists and rafters or through studs. Use with copper, PEX, CPVC and other piping systems. Versatile design makes it easy to work with. Rigorously tested and proven to last in many conditions. 6 Pack Size: 3/4" Insulating Suspension Clamp Allows pipe to be secured to joists and rafters or through studs Use with copper, PEX, CPVC and other piping systems.