| Inner Diameter | 2 mm |
| Outer Diameter | 5 mm |
| Thickness | 2.5 mm |
| Models | W638/2-2Z, W639/2-2Z, W60/2.5 |
| Lubrication | Grease or Oil |
| Origin | China |
High-performance miniature ball bearings with rich stock, 100% on-time delivery, and fast response (<0.5h). Suitable for precision applications requiring Z1V1–Z3V3 vibration control. OEM/ODM supported. Certified with HS Code 8482102000.