I bought these and they’ve been fine for 3 months of use. DLD Replacement Accessory Kit for iRobot Roomba i7 i7+/i7 Plus E5 E6 Vacuum Cleaner.Replacement Parts Set (2 Set of Multi-Surface Rubber Brushes,4 Side Brushes,4 Filters,1 Tools) https://www.amazon.com/dp/B07RFR2ZT3/ref=cm_sw_r_cp_api_glt_i_ZKBPFVGV0THN86W00SKQ