Applicable Model: Suitable for iRobot Roomba i7 i7+ i3 i3+ i4 i4+ i6 i6+ i8 i8+ j7 j7+ Plus E5 E6 E7 I & J & E Series Robot Vacuum Cleaner. (Please confirm your vacuum cleaner model before purchasing) Replacement parts help the robot easily remove dust and debris from corners and edges. If the side brushes bend due to shipping, recover them by simply soaking them in warm water, clean the replacement parts regularly to improve suction and performance, and extend the life of your robot vacuum cleaner. It is recommended to replace the side brushes and filters every 2 to 3 months, every 6 months, replace the multi-surface rubber brushes, also depending on the frequency of use. Color: As shown Material: Plastic Package Contents: 1 x Dual Rubber Multi-Surface Brushes 8 x Edge Cleaning Brushes 8 x Hepa Filter 8 x Cleaning Dust Bag Only the above package content, other products are not included. The measurement allowed error is +/- 1-3cm.