Overview NiArt presents the 16 Pack Fidget Spinner Bearing and Cap Replacement Set, a thoughtfully designed kit for DIY spin enthusiasts. This bundle brings together 16 MR137 precision high-speed bearings with blue plastic seals and 16 pairs of black caps, all sized for reliable...

Upgrade your fidget spinner with a versatile replacement kit Discover a practical, all in one solution for refreshing your fidget spinner projects. The NiArt 20 pack combines precision MR137 bearings with durable caps, designed for smooth spins, reliable durability, and easy swaps. This kit...

Overview Discover a versatile kit from NiArt built around the MR137 high‑speed bearing. Each compact 0.5" unit pairs a robust chrome steel core with a one‑sided seal, and it comes with durable caps. Designed for quick, smooth rotation, this set supports a wide range...