These are DNV approved corrosion resistant perforated worm drive clamps. They are constructed from top quality 304 marine-grade stainless steel components. They provide excellent sealing capability when used with marine silicone hoses, while offering great flexibility as a general purpose clamp.
Suitable hose diameters are listed below, while the height of the clamp is 16 mm and the thickness is 0.9 mm. This can make it easier to fit the clamps in situations where there is limited access.