ERFECT FIT - The replacement parts only compatible with for iRobot Roomba Combo j7+ Combo j9+, works great and easy install. NOT fits for other models.Please check if your model is compatible before ordering! HIGHLY EFFICIENT FILTERING TECHNOLOGY - Two premium quality 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 99.97% of dirt, dust and other particles as small as 0.3 Micrometres in size. EASY TO CLEAN AND REPLACE - Clean by hand washing in warm water and let it completely air dry before reusing them. Regularly clean replacements parts to improve suction and perford extendsmance an the life of your. For best results, edge-sweeping brushes and filters should be replaced every 2 - 3 months.Multi-surface rubber brushes should be replaced every 6 months. Note:Due to different production batches, there may be slight differences, which does not affect use. Colour:As Shown Material:Plastic Package Contents: 1 pair * roller brushes 4 * filter 4 * dust bag 3 * rag Cloth 6 * side brush 1 * cleaning brush 1 * screwdriver Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.