Features 1. Premium Quality: Experience a product crafted with superior standards, ensuring unmatched quality and durability for dependable use. 2. Material: Constructed from high-grade steel, this item promises long-lasting reliability and endurance under frequent and intense usage conditions. 3. Precision Design: Features a V groove on the bearing that seamlessly aligns with guide rails for enhanced accuracy and stability in performance. 4. High Efficiency: Engineered for smooth with minimal error and noise, this component excels in applications demanding high-speed functionality. 5. Versatile Application: Ideal for a wide range of uses including motors, toys, models, instruments, electrical tools, communications equipment, and fitness , this product meets diverse needs in both professional and projects. 1. High quality. 2. Made of high quality steel material for durability and long service life. 3. Bearing has a V groove that generally rides on a guide rail. 4. Smooth , small error, low noise, high speed. 5. Suitable for motor, toys, model, instrument and meter, electric tools, communication equipment, fitness equipment and other fields. Spec: Features: high quality. Made of high quality steel material for durability and long service life. Bearing has a V groove that generally rides on a guide rail. Smooth , small error, low noise, high speed. Suitable for motor, toys, model, instrument and meter, electric tools, communication equipment, fitness equipment and other fields. Specification: Model: TV0418 Material: Bearing Steel Inner diameter: 4mm Outer diameter: 18mm Thickness: 8mm Package list: 10 * V Groove Ball Bearing Package List