Miniature Bearings: This set includes 10 precision ball bearings, ensuring smooth operation and durability for various applications. Versatile Compatibility: for RC cars, drones, and a wide range of DIY projects, these miniature bearings are designed to meet diverse needs. Multiple Sizes Included: The set features 683ZZ, 684ZZ, 685ZZ, 686ZZ, 687ZZ, 688ZZ, and 689ZZ sizes, providing options for different projects and machinery. Easy to Install: Designed for hassle-free installation, these small bearings are for hobbyists and professionals alike. Corrosion-Resistant Material: Made from materials, these bearings offer excellent resistance to wear and tear, ensuring long-lasting performance., Manufacturer: MERHOVO