Key benefit: protects the internal parts of the main brush from rust, reducing wear and extending the service life of the brush assembly. Charging unaffected: designed and installed so it does not interfere with the vacuum cleaner's charging function; charging contacts and docking behavior remain normal after installation. Safe material: made from environmentally friendly, nontoxic material suitable for everyday home use. Easy installation: simple adaptation process that can be completed without complex tools; quick to install or remove during routine maintenance. Compatibility and fit: intended for use with the main brush/internal brush housing of compatible vacuums; compact profile that does not obstruct moving parts or the docking process. Performance: provides reliable corrosion protection for internal metal parts, helping maintain smooth brush rotation and consistent cleaning performance over time. Use scenarios: Homes in humid or coastal environments where internal metal parts are prone to rust: install to protect the main brush shaft and bearings. Households with frequent vacuum use or pet hair: reduces deterioration of internal brush components and lowers the frequency of replacements. During routine maintenance or when replacing the main brush: fit quickly to preserve remaining components and extend overall brush life. Practical details: Function: rust prevention for internal main brush parts. Material: environmentally friendly, nontoxic. Installation: toolminimal, userfriendly adaptation. Effect: prolongs main brush lifespan without impacting charging or docking.