Amyehouse Replacement Parts Bristle Brush & Flexible Beater Brush & 6-Armed Side Brush & Filter & Clean tools Replenish Kit for iRobot Roomba 500 Series 510 520 530 550 The replacement parts kit is compatible with iRobot Roomba 500 Series 510 520 530 550 The innovative brush reaches deep into corners and edges to remove more dirt, dust and debris.It can be easy to remove and replace as part of routine maintenance. Filters maintain Roomba's cleaning performance while reducing infiltration of dust, pollen and other allergens into the air you breathe. For best results, filters should be replaced every 2 - 3 months. The kit contains: 1 x Bristle Brush & 1 x Beater Brush 3 x 6-Armed Side Brushes & 3 x Yellow Filters & 2 cleaning tools