Features: _x000D_ 1. Made of premium steel material, anti-corrosion and rustproof, durable in use. _x000D_ 2. High accuracy, stable performance, long service life and high reliability. _x000D_ 3. Double-sided metal shielded design, waterproof and dustproof. _x000D_ 4. Exquisite mechanical design makes little noise when rotating. _x000D_ 5. Fine workmanship, smooth surface, excellent mechanical properties. _x000D_ _x000D_ Specification: _x000D_ Model: 682-ZZ, 683-ZZ, 684-ZZ, 685-ZZ (Optional) _x000D_ Size: _x000D_ 682-ZZ: ID: 2mm, OD: 5mm, Thickness: 2.5mm _x000D_ 683-ZZ: ID: 3mm, OD: 7mm, Thickness: 3mm _x000D_ 684-ZZ: ID: 4mm, OD: 9mm, Thickness: 4mm _x000D_ 685-ZZ: ID: 5mm, OD: 11mm, Thickness: 5mm _x000D_ Bearing material: Bearing steel _x000D_ Cage material: Steel plate _x000D_ Operating characteristic: High speed _x000D_ Rolling element type: Steel ball _x000D_ Column number of rolling element: Single column _x000D_ Raceway type: Deep groove raceway _x000D_ Angle: 15 _x000D_ Sealing cap: Double-sided metal shielded _x000D_ _x000D_ Package list: _x000D_ 10 * Bearings 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.