Unistrut Adjustable Fiberglass Pipe Clamps are manufactured from glass reinforced polyurethane and are adjustable to accommodate a wide range of outside diameters. They can be utilized with a variety of piping sytems including PVC, fiberglass, copper, rigid steel conduit and PVC coated rigid steel conduit. NOTE: care should be taken not to exceed 3ft / lbs of torque on the adjustable pipe strap.