Features: Applicable for skateboard wheels, model, toys, furniture accessories, assembly line, etc. Inner full ball arrangement, cage-free, flexible operation, bright looks, cost-effective. Specifications: Material: iron Color: silver tune Model: 681ZZ Inner diameter: 1mm Outer diameter: 3mm Thickness: 1mm Weight: about 1g Package Included: 10pcs 681ZZ Ball Mini Bearings.
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