Features Size: Miniature ball bearings are very small ball bearings available. These miniature ball bearings have an inner diameter of 5 mm, an outer diameter of 11 mm and a thickness of 4 mm. Precise parts: bearings are widely used and are economical standards, well suited for precision work and applications that require a large number of functional mechanical parts in a small space High speed: Steel double shielded miniature ball bearings have stable performance, easy to use, less friction, faster speed and more durable, improve the efficiency of mechanical work to a greater extent Non-contact double rubber seals: Double shielded deep groove bearings use special non-contact double rubber seals to hide dirt when present, and have no friction performance. Easy to Install: Steel deep groove ball bearings are easy to install and replace, weigh only 8g and can be used in machines such as 3D printers, quadcopters or models Description: Miniature ball bearings are available ball bearings of quite small dimensions. These miniature ball bearings have an inner diameter of 5 mm, an outer diameter of 11 mm and a thickness of 4 mm. Ball bearings of this size are perfect for precision work and applications that require many functional mechanical parts in a small space, such as a 3D printer, quadcopter or model. Features: 1. Deep Groove Ball Bearings 2. Widespread bearing, economic and standard 3. Less friction, higher speeds and durability 4. Special non-contact double rubber seals to hide dirt during application. frictionless performance. 5. Easy installation replacement Specifications: Material: bearing steel Model: MR115-2RS Color: As the picture shows Size: about 5*11*4mm(ID*OD*H) Weight: 16g Quantity: 10pcs Note: Please allow 1-3mm error due to manual measurement. Please make sure you don't mind before bidding. Package Included: 10 x bearings Package List Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.