Amyehouse Replacement Parts Side Brush 3 Armed and 6 Filters for iRobot Roomba 500 Series 510 520 530 550 560 570 580 The replacement parts kit is compatible with iRobot Roomba 500 Series 510 520 530 540 550 560 570 580 Vacuum Cleaning Robots For best results, filters should be replaced every 2 - 3 months Made of high-strength and environmental protection material 6 x armed-3 side brush 6 x filter