Nilfisk SM800 and ALTO Floortec 480M Walk Behind Sweeper Side Broom Belt
These are translucent and TWO are needed on each machine.
This is the part number and price for a single belt. They are shown, in the lower half of the photo.
Simply, if you need two, you have to put two in your cart. They are sold singly.
As it's light, maximise the saving on postage and buy some of the related parts below, such as the side brooms or the whole set of belts.
At the moment, standard postage within Australia is capped at a maximum of $25