RED and BLUE Prolene brushes (normal) for both the and the small auto electric scrubbers.
There are an inner ring of BLUE Prolite bristles and an outside ring of stiffer Prolene bristles.
Find the BLUE Prolite brushes
Two brushes are needed for a set. Brushes are best used for tiles, because the bristles clean in the grout lines, whereas pads don't.
Price is for ONE brush.
At the moment, standard postage is capped at a maximum of $25 within Australia, so maximise the saving on postage and buy something in the related parts below!