Nilfisk industrial vacuum cleaner hose 50mm knurled long ball end. Used to repair or make 50mm hoses for the and the and the etc. vacuum cleaners.

If the hose is too tight to fit this part, use PN

As it's light, maximise the saving on postage and buy some of the related parts below, such as dustbags and other filters or a new floor tool or other accessories. 

At the moment, standard postage within Australia is capped at a maximum of $25!