Flanged ball bearing, low noise bearings, for 3D quadcopter model printer

Features: 1. These miniature bearings are made of high-quality bearing steel for low noise and long service life. 2. They are double-shielded to prevent contaminant ingress and conserve lubricant. 3. The bearings have an inner diameter of 4 mm, an outer diameter of 9 mm, a thickness of 4 mm, and a flange of 10.3 mm. 4. They are perfect for small 4 mm shaft/rod projects such as 3D printers, quadcopters, or model boats. 5. There are a total of 10 miniature bearings that you can use for many different projects. Specifications: Description: Miniature flanged ball bearings are ball bearings available in a fairly small size. These miniature ball bearings have an inner diameter of 4 mm, an outer diameter of 9 mm, a thickness of 4 mm, and a flange of 10.3 mm. Ball bearings of this size are ideal for precision work and applications requiring numerous functional mechanical parts in a small space, such as 3D printers, quadcopters, or model ships. Features: These miniature bearings are made of high-quality bearing steel for low noise and long service life. They are double-shielded to prevent contaminant ingress and conserve lubricant. The bearings have an inner diameter of 4 mm, an outer diameter of 9 mm, a thickness of 4 mm, and a flange diameter of 10.3 mm. These are perfect for small 4 mm shaft/rod projects such as 3D printers, quadcopters, or model ships. There are a total of 10 miniature bearings that you can use for many different projects. Specifications: >Material: Bearing steel Inner diameter: 4 mm / 0.15" Outer diameter: 9 mm / 0.35" Thickness: 4 mm / 0.15" Flange diameter: 10.3 mm / 0.4" Quantity: 10 pcs Package includes: 10 x bearings