1. Product Overview The 687ZZ miniature deep groove ball bearing is designed for small‑size rotary equipment, offering high‑precision and low‑noise performance.It is widely used in electronic devices and small motors where compact dimension and stable running are required. 👉 Get a quote within 24 hours for your project 2. Technical Specifiions Model 687ZZ Inner Diameter (ID) 7 mm Outer Diameter (OD) 14 mm Width 5 mm Structure Deep Groove Ball Bearing Material Chrome Steel