This is a semi-rigid hose which stays put when bent into shape. Amongst its various properties is its ability to change diameter over a range of about plus or minus 20mm when twisted in either clockwise or anti-clockwise directions. This means that a short length suitably adjusted for diameter can be used to adapt between hoses and machine outlets of different sizes. Another useful application is as a dust collector on a lathe or a bench-mounted machine with a short length of the hose being connected to the end of the extractor hose and positioned close to where the dust is generated. Available in grey, 102mm(4") diameter in lengths of 1 metre.