The clamps eliminates vibration & thus fittings and connections do not loosen they make piping neat and sturdy sizes upto 6 n b materials body hdpe to & bottom plates of mild steel zinc passivated material carbon steel & stainless steel sizes 1/16 to 2 od 1/4 to 11/2 nb 4mm to 50mm od end bsp bspt npt connection metric unf pressures upto 10.000 psi