Nilfisk AX400 AX300 and Advance Aquaclean Extraction Machine Roller Brush Axle Washer
The photos are from a customers machine in for repair, to illustrate the part. In the main photo, it's the bone coloured, round washer in the centre of the photo. Needless to say, you will get a brand new one when you order.
At the moment, as postage is capped at a maximum of $20, maximise the saving on postage and buy some of the related parts below, such as some hose and other carpet or upholstery cleaning accessory or a Nilfisk vacuum cleaner replacement filters and dustbags, or a new floor tool!