Usage Tips:Description: Mini flanged ball bearings are available ball bearings of quite small size. These mini ball bearings have a 6mm inner diameter, a 13mm outer diameter, a 5mm thickness and a 15mm flange. Ball bearings of this size are ideal for precision work and applications that require a lot of functional mechanical parts in a small space, such as electric motor, 3D printer, quadcopter or model. Features: These mini bearings are made of bearing steel for low noise and long service life. They are double shielded to avoid contaminants entering and save lubricant. Bearings have a 6mm inner diameter, a 13mm outer diameter, a 5mm thickness and a 15mm flange. These are great for small hobby 6mm shaft/rod projects such as electric motor, 3D printer, quadcopter or ship model. There comes total 10 pieces mini bearings which you may use for many different projects. Specifications: Material: Bearing steel Inner Diameter: 6mm / 0.23" Outer Diameter: 13mm / 0.51" Thickness: 5mm / 0.19" Flange Diameter: 15mm / 0.59" Quantity: 10pcs Package Includes: 10 x Bearings