Secure up to 1 inch tubing to Stout Brackets, EZ-Strut trapeze platforms or framing members with the Holdrite Variable Closure Isolation Clamp. Composed of strong and sturdy plastic, this isolation clamp features fire retardant framework which meets requirements of UL 94 V-2 rating. The isolator clamp is ideal for use with with copper, PEX, CPVC, iron pipe and other system materials.