Specifications Hign-concerned Chemical:None Vacuum Part Type:BRUSHES Model Number:For iRobot Roomba i3 i3+ i4 i6 i6+ i7 i7+ i8 i8+ E5 E6 E7 Type:Vacuum Cleaner Parts Features: 1. Brushes keep your home robot operating at peak performance. 2. Side brushes are easy to remove and replace as part of routine maintenance. 3. Replacement filters for iRobot Roomba I / E SeriesVacuum Cleaner Robots. 4. Filters maintain for Roomba's cleaning performance while reducing infiltration of dust, pollen and otherallergens into the air you breathe. 5. For best results, spare parts should be replaced every 1 - 3 months. For iRobot Roomba i3 i3+ i4 i4+ i6 i6+ i7 i7+ i8 i8+ E5 E6 E7 NoteThe combo kit is not for J7/J7+/PLus and J9/J9+/plus and i1/i1+ Before placing an order, please make sure that your device model is the relevant compatible model mentioned on this product page. You can check the specific product model on the nameplate at the bottom of the device (many sweepers have very similar names, so they need to be distinguished by specific models) , If you request a refund due to the purchase of the wrong product, you will be responsible for the round-trip shipping.