1. Material: These Metal Flanged adopt with steel material, which is durable enough for long-term use, at the same time, it is designed with a surface to a high efficiency with a low noise during working, no worry about rusty and corrosion 2. Double Sealed for Long Term Service: These Flanged Metal Steel are designed with double sealed/ shielded to the from dust, water and foreign matter or any possible contaminants invasion, and it can keep lubricant in for a long time use as , saving a lot 3. Multifunctional Flanged : There comes with totally 10 pieces of Flanged in the package, which can be used for various of different projects, you can keep for spare or just use to replace the old ones, very easy and convenient. And they are applicable to mechanical equipment, electrical instruments, toys, doors, windows and etc 4. Suitable Size: These Flanged Metal Shielded are great for 8mm shaft/rod projects with it's compact size,Suitable size for different projects 5. Performance: These Flanged Miniature Bearings feature with strong driving capacity, high endurance and high precision balls for assembly . It can be applied for high speeds and supporting both and axial loads that needs high running accuracy at high rotational speeds. Specifications: Flange Diameter: 18mm / 0.7inch colour: silver Material: steel size: 8 x 16 x 5 mm Package Contents: 10 x Bearings Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.