... Rubber Size:M12-320mm zinc plated /stainless steel Specificationsworm drive hose clamp1 bandwidth 12.7mm2 Material; w1& w2&w3&w4 ... seriesAmerican type screw band worm drive hose clampsis mainly used in automobiles, tractors, ships, gasoline engine, ... on each kind of mechanical device for oil, gas, hydraulic hose connector, various types of rubbertube interface must join parts fastening. ...