Main Brush Roller Filter Screen $ 4.55 Features: 1: The Weight Of This Product Is 214G, (A Set Of 6/7 Series Rubber Brush (1 Brush + 1 Brush) + 5/6/7 Triangle Brush 2 +5/6/7 Hex Side Brush 2 + 7 Series Filter 4), 2: This Product Is Suitable For: Irobot7 Series 760/770/780/790 And Other Sweeping Machine Furniture Floor Cleaning 3: The Bristles Are Made Of Nylon, Which Is Sturdy And Durable. Recommendation: Clean After 1-3 Uses Of Roomba (Depending On The Amount Of Cleaning In Your Home). Regular Replacement Is Required To Keep Your Home Robots Performing! Material: Abs Weight: 214G Package Contents: 1 X Brush 1 X Glue Brush 4 X Side Brush 4 X Filter Net