A BEARING IN A BEARING FIDGET SPINNER / How fast can it spin? - YouTube
Amazon.com: 16 Pack Fidget Spinner Bearing and Cap Replacement Set, Chrome Steel Bearing Balls, High Speed 13mmx7mmx4mm Bearings Single Sealed Small Bearings for Fidget Spinner
Tempest Spinner Bearing Conversion Kit
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Fidget spinner bearings compared: Ceramic vs Steel vs Hybrid Ceramic - YouTube
Amazon.com: 10 (Ten) Fidget Spinner Bearing, 608 Open, Chrome Steel Bearing Balls, 8x22x7, Ball Center Replacement Part Kit : Toys & Games
Hybrid Alloy Bearing Fidget Spinner | Hand Spinner Bearing R188 - Aluminum Alloy Hand - Aliexpress