Comprehensive Compatibility: Designed specifically for J4/J5 001, this kit ensures proper fit and function for your robotic vacuum. Time for an Upgrade: Replace worn or damaged wheels to restore full mobility and enhance operational efficiency. These high-quality replacement wheels are designed to replace old, broken, or missing casters. Simple Installation Process: Designed for hassle-free installation without additional tools. The user-friendly design allows for quick and easy replacement. Premium Construction: Made with high-grade materials for durable performance under normal operating conditions. Comprehensive Pack: Each package includes two premium-quality front caster wheels, two brackets, and all necessary components for immediate replacement. This twin pack enables simultaneous replacement of both wheels to maintain balance and performance. Function: Assisted sliding Use Environment: Home use Model: For J4/J5 001 Color: Grey Material: Plastic Package Contents: 2 x wheel 2 x bracket Note: Light reflection and different displays may cause slight color variation between the image and the actual product. Measurement tolerance is ±1–3 cm.