Dust collection hose to adapt your vacuum to the dust collection hood.  We find this to be the ideal combination of light weight and flexibility and the fitting fits snugly on the dust collection hood discharge port.  The hose includes two identical fittings 1-9/16" id (40mm), 1-3/4" od (44.5mm).  The hose comes in a 5 foot long section and is very flexible yet holds its shape without kinking.