[Premium Material] Constructed from high-grade ABS, this universal wheel for sweepers is wear- and anti-aging, ensuring durability and a long service life. It's designed to withstand regular use without breaking, making it a reliable replacement. [Enhanced Performance] Featuring precision engineering, this replacement wheel boasts stable performance and enhanced design with bearings that prevent wear-related , facilitating smoother wheel rotation and extended functionality. [Easy Installation] This practical sweeper accessory requires no tools for installation. It's perfectly sized to replace old, broken, or missing front caster wheels, making your sweeper run like new with minimal effort. [Wide Compatibility] Specifically designed to fit for RoboVac models 11s and 30, this replacement wheel helps your vacuum cleaner navigate and change directions efficiently, boosting overall cleaning performance. [Maintenance Tip] Regular maintenance is crucial for optimal performance. If the front caster wheel is squeaking, not rotating, or falls out, it's time to clean or replace it to maintain operational efficiency. Colour:Black Material:ABS Package Contents: 2 * Universal Wheel 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.