Compatible with Model: This iRobot replacement parts is suitable for I series of iRobot Roomba. Perfectly fit iRobot Roomba i3+ EVO(3550) i3 EVO(3150)/ i4+ EVO(4552) i4(4192)/ i6+(6550) i6(6150)/ i7+(7550) i7(7150)/ i8+(8550) i8(8150)/ i2(2152)/ i1 i1+..High-quality & Functional: Roomba replacement parts made of environmentally-friendly materials, use precision manufacturing process, vacuum accessories function exactly the same as the original, perfectly compatible with Roomba I Series Robot Vacuums..Warm Tips: Regularly clean replacements parts to maintain suction and performance of your Roomba. For best results, edge-sweeping brush and filter should be replaced every 2 - 3 months. Multi-surface rubber brush should be replaced every 6 months..Highly Efficient Filtering Technology: Two 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% cat and dog dander allergens, dirt,dust and other particles as small as 0.3 microns in size..iRobot Vacuum Bags: Dirt disposal bags consists of 2 layers of superfine melt-blown fiber filter layer and 2 layers of non-woven fabric, which can collect 99% of the waste. With self-locking seal collar, vacuum bags can tightly locks dust and dirt, no worry about secondary pollution. Capacity is 30 bins and it's better to replace the Roomba bags every two weeks.