Features: 1. Made of premium steel material, anti-corrosion and rustproof, durable in use. 2. High accuracy, stable performance, long service life and high reliability. 3. Double-sided metal shielded design, waterproof and dustproof. 4. Exquisite mechanical design makes little noise when rotating. 5. Fine workmanship, smooth surface, excellent mechanical properties. Specification: Model: 682-ZZ, 683-ZZ, 684-ZZ, 685-ZZ (Optional) Size: 682-ZZ: ID: 2mm, OD: 5mm, Thickness: 2.5mm 683-ZZ: ID: 3mm, OD: 7mm, Thickness: 3mm 684-ZZ: ID: 4mm, OD: 9mm, Thickness: 4mm 685-ZZ: ID: 5mm, OD: 11mm, Thickness: 5mm Bearing material: Bearing steel Cage material: Steel plate Operating characteristic: High speed Rolling element type: Steel ball Column number of rolling element: Single column Raceway type: Deep groove raceway Angle: 15 Sealing cap: Double-sided metal shielded Package list: 10 * Bearings Package List 11. Made of premium steel material, anti-corrosion and rustproof, durable in use. 22. High accuracy, stable performance, long service life and high reliability. 33. Double-sided metal shielded design, waterproof and dustproof. 44. Exquisite mechanical design makes little noise when rotating. 55. Fine workmanship, smooth surface, excellent mechanical properties.