NiArt 20-Pack DIY Fidget Spinner Toy Bearing with Caps Set, MR137 0.5" Single-Sealed Chrome Steel Bearing Balls Replacement High Speed 13mmx7mmx4mm Epoxy Resin Casting Craft Skateboard Stress Reliever

✅【20PCS Bearings + Caps Set】Includes 20x MR137 precision high-speed ball bearings with blue plastic seals and 20 pairs of ball bearing caps in black color (diameter: approx. 2.1cm). MR137 Steel Ball Bearing size: I.D. (inner diameter) =7mm, O.D. (outer diameter) = 13mm, Thickness: 4mm. ✅【Premium Quality】The bearings are made of high-quality stainless steel and plastic for durability and deformation resistance under heavy loads. Inner and outer races are machine polished for smooth, high-speed rolling. This bearing provides higher speeds, precision, and durability, reducing replacement and maintenance costs. ✅【Radial Ball Bearings】MR137 bearings are sealed on one side to protect the equipment against contaminants such as dust and water and retain lubrication. Stainless steel races ensure durability and corrosion resistance. Single row radial ball bearings support applications with radial and axial loads. ✅【Wide Application】Caps made with ABS plastic are lightweight and durable, compatible with MR137 bearings. With easy-to-install components, this bearing is perfect for a wide variety of applications, including fidget spinners, skateboards and other DIY projects. Use as replacement when the original caps and bearings are lost or damaged. ✅【Safety Disclaimer】We accept no responsibility or liability for the misuse of this product. All our products are extensively tested to comply with rigorous and strict QC standards. We recommend proper supervision as we are not responsible for accidents due to misuse. WARNING: SMALL PARTS CHOKING HAZARD - Not for children under 3yrs. Caution: Keep small parts and plastic bags out of children's reach during and after assembly., Manufacturer: Attom Tech