Hydra-Zorb 304SS Cushion Clamp 304 stainless steel cushioned strut clamp secures uninsulated tube and pipe runs against damage from shock, movement, and vibration, eliminating metal to metal contact. Since their invention in 1966, our clamps have been used for decades in the plumbing, hydraulics & pneumatics, and HVAC industries, and are ideal for any application where damage from pipe movement is a concern.