10pcs F684ZZ Miniature Double Shielded Ball Bearings 4x9x4 mm for 3D Printer Model High Strength

• There are a total of 10 miniature bearings that you can use for many different projects
• The bearings have an internal diameter of 4 mm, an external diameter of 9 mm, a thickness of 4 mm and a flange of 10.3 mm
• Ideal for 4 mm shaft/shaft projects such as 3D printers, quadcopters or ship models
• Made of high quality steel for a reduced lifespan and great noise reduction
• Double shielded to prevent contaminants and save lubricant

Description: Miniature ball bearings are small ball bearings. These miniature ball bearings have an internal diameter of 4mm, outer diameter of 9mm, thickness of 4mm, and a flange of 10.3mm. Ball bearings of this size are ideal for precision work and applications requiring a lot of functional mechanical parts in a limited space, such as 3D printer, quadcopter or model. Features: Material: bearing steel. Inner diameter: 4 mm. External diameter: 9 cm/0.35 inches. Thickness: 4 cm/0.15 inches. Flange diameter: 10.3mm/0.4 inches. Quantity: 10 pieces. Package includes: 10 x bearings.