Features: 1.98inches, developed to aligns with common trailer component specifications, simplifying replacement or enhancement. Protected Cover Design: Includes a protected cover to block dust, moisture, and other debris from entering the component, enhancing its service durations and reducing the need for frequent maintenance. Easy Lubrication: Features a dedicated lubrication port for simple maintenance, ensuring the component stays well-oiled and functions effectively. Superior Load Handling: Excellent load-handling capability, suitable for trailers of various weights, ensuring secure and stable transportation of goods. Smooth Operation Design: Optimized internal configuration minimizes resistance, improving overall functionality, smooth operation, and reducing energy consumption. Specifications: Component: Steel+Silicone Diameter:Approx.1.98inch Product function: Reduce wheel bearing failures in marine trailer, extend bearing life, prevent water and dirt from entering the wheel hub and bearing; Use scenario: Suitable for all kind of trailers, marine trailers and other vehicles that require bearing support; Package Includes: 1set/4pcs bearing buddys Protectors note: Please allow 1-10mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.