4 REPLACEMENT SIDE SWEEPERS: Parts kit includes 2 pairs of extra side sweepers. Easily remove and replace the existing side sweepers so no debris is left behind REVITALIZE YOUR ROBOT: Keep your automatic vacuum running at maximum efficiency. Filters and side sweepers have a limited lifetime and need to be replaced after a few months of use COMPATIBLE WITH PUCRC25 and PUCRC26B: Only designed for use with PUCRC25 and PUCRC26B 2 REPLACEMENT FILTERS: Dirty filters will bog down your robo vac and reduce its suction power. Kit includes 1 dustbin filter and 1 Air filter