ITEM NAME:Shielded-Micro-Mini Small Wheel Ball Bearings 624Z 4 x 13 x 5mm Hot 5 pcs Descriptio n Description: The inner diameter is 4mm, outer diameter is 13mm and the width is 5mm, could be used in many applications. Closed with 2 metal shields to protect the bearings from dust or any possible contamination. Commonly used for Wheel Bearings, Automobile Applications and much more. Product Name : Ball Bearing; Model : 624Z Material : Metal Color : Silver Tone Inside Diameter : 4mm / 0.16"; Outside Diameter : 13mm / 0.51" Width : 5mm / 0.2"; Package Content : 5 Pcs Ball Bearings Note:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. We offer you what you need! BI01203A1.Model : 624Z. Width : 5mm / 0.2";. Note:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. We want to make sure you are happy with our item.