Nilfisk CA340 portable electric floor scrubber and the Advance Micromatic rear swivel castor. There is only ONE castor in this package. There are two needed per machine.
Wheel Diameter is 75mm; Tyre Thickness 25mm; Total Height 100mm; Fixing Hole Diameter 10mm.
At the moment, standard postage within Australia is capped at a maximum of $25 so maximise the saving on postage and buy some of the related auto scrubber parts below!