Compatibility and fit This replacement Brush Bottom Cover is designed for Shark AI Robot models including AV2501AE, AV2501S, RV2520A0US, and other compatible units. It provides a precise fit that integrates seamlessly with your device for reliable performance. Durable construction The lid plate is a black plastic component built with a sturdy structure using strength polycarbonate and 304 stainless steel injected antiwrap wires to prevent cable tangling around the main brush during operation. Sealed pad design for suction Includes an imported Bayer seal strip that resists deformation and maintains an airtight seal, guaranteeing strong suction and improved performance on hardwood, tile, and laminate surfaces. Floor protection Installed at the point where the brush meets the ground, this cover helps prevent scratches and scuffs on wooden floors, keeping your home protected during every cleaning cycle. Use scenarios Routine hardwood or laminate floor cleaning: worn parts to maintain a tight seal and consistent suction while protecting floor finishes. Homes with pet hair or long debris: antiwrap wires help minimize tangling around the main brush, sustaining cleaning efficiency. Quick maintenance or part replacement: easy swapin to restore performance without lengthy downtime.