PERFECT FIT NOT original replacement parts. Replacement Parts Accessories Compatible with iRobot Roomba s9 (9150) s9+ s9 plus (9550) s Series Robot Vacuum Cleaner.PACKAGE INCLUDES multi-surface rubber brushes for iRobot Roomba s9 (9150) s9+ s9 plus (9550) s Series Robot Vacuum Cleaner.EASY TO CLEAN 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.Color as shownMaterial RubberPackage Contents 4 x roller brushOnly the above package content, other products are not included.Note Light shooting 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.