Features: 1.Every product has a unique Manufacturing Part Number label on the inner package that proves it has been qualified,which include Part Number,Model Number and inspection date information; 2.If you have any questions about the item,please provide us the Manufacturing Part Number for checking,your profits will be guaranteed. 3.Made of bearing steel, model is MR104ZZ. 4.Bearings have 4mm inner diameter, 10mm outer diameter, and 4mm thickness. 5.Uses: toys, jewelry, decoration, ornaments, video card fans, power tools, etc. 6.Total 10 pieces mini bearings which you may use for many different projects. .
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