Compatible Model: This Replacement Parts Kit Compatible For Roborock S7 Max Ultra, S7, S7+, S7 Maxv, S7 Maxv Plus, S7 Maxv Ultra, S7 Pro Ultra, Q7, Q7+, Q7 Max, Q7 Max Plus, Q Revo Robotic Vacuum | | What'S Inside: 6 X Roller Brushes | | Antitangle Design: This Main Brush Adopts An Innovative Anti-Tangle Design, Which Effectively Reduces Hair Tangle Problems | | Easy To Replace: Snap Into Place For Quick And Effortless Routine Replacement. No Tools Required, Easy To Replace The Main Brush | | Maintenance Instructions: Please Replace The Brush Every 2 Month To Keep The Vacuum Working With High Performance | |