PERFECT FIT – Compatible with iRobot Roomba E series E5 (E5134) E6 (E6198) E7 I series i7(7150) i7+ i7 plus(7550) i1+(1552) i4+(4550 4552)i3+(3550) i6+(6550) i8+(8550) j7+ (7550). This set works as great as the original ones, precision fit and easy install. HIGHLY EFFICIENT FILTERING TECHNOLOGY – Two premium quality rubber brushes are perfectly matched, one for peeling off dirt and the other for sweeping dirt. The side brush reaches deep into corners and edges to remove more dirt, dust and debris. The cleaning filter blocks 99.97% of pollen, dirt, dust, pet dander and other particles as small as 0.3 microns in size. EASY TO CLEAN AND REPLACE –Clean by hand washing in warm water and let it completely air dry before reusing them. Regularly clean replacements parts to improve suction and perford extendsmance an the life of your . For best results, edge-sweeping brushes and filters should be replaced every 2 - 3 months.Multi-surface rubber brushes should be replaced every 6 months.