Comprehensive Compatibility: Designed specifically For X20 SW+ / 11415/ X21 SW+ / 11500, this kit ensures a and function for your robotic vacuum. Maintenance Recommendations: To maintain optimal, it's advised to clean the regularly and replace every 1-2 months, depending on usage frequency. This routine ensures your vacuum operates at efficiency. Premium Construction: Made with high-grade materials, this part not only promises but also guarantees robust performance under operating conditions. It's an essential upgrade for anyone looking to maintain their appliance in top condition. Simple Installation Process: designed for hassle-free installation without the need for additional tools. The user-friendly design allows for quick and easy replacement, making maintenance a breeze and saving you time. Model:For X20 SW+ / 11415/ X21 SW+ / 11500 Function:Cleaning Colour:As Shown Material:Plastic Package Contents: 1 * main brush 10 * side brush 10 * dust bag 10 * filter 10 * Mop Cloth 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.