Worm drive hose clamp for securing hose to machinery or fittings. 

50HC : For 50mm diameter hose 2"

65HC : For 65mm diameter hose 2.5"

75HC : For 75mm diameter hose 3"

100HC: For 100mm diameter hose 4" 

125HC: For 125mm diameter hose 5"

150HC: For 150mm diameter hose 6"