Dimensions:Inner diameter: 4mm. Outer diameter: 8mm. Width: 3mm. Miniature deep groove ball bearings, model MR84-2RS, with a size of 4mm (inner diameter) x 8mm (outer diameter) x 3mm (width). Includes double rubber seals for protection. Sealed Design: Double rubber seals prevent dust and debris from entering, ensuring smooth operation. Versatile Application: Designed for small and precise mechanisms. Application:DIY Projects: Common in hobby-grade DIY toys and robotics.3D Printers: Used in precision parts like stepper motors or extruders.
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