Size: 8mm×22mm×7mm Material:7 Ceramic balls, inner and outer races are made of Stainless Steel It can spin last for 2 to 3 minutes with each spin When you apply it to Tri-Spinner Fidget Toy Deep groove geometry for supporting both radial and axial loads and high speeds Ceramic balls for resistance to shock, corrosion, and high temperatures,high rotation speed Pack of 2 Black Ceramic Balls bearing set. The set has high speed solid Ceramic Balls (not painted or filled with Ceramic Material), bearings have high speed ball retainer.You can get the durability of Ceramic balls , high rotation speed and Lower friction means longer running time and service life

• Designed for Fidget Spinner Toy：High quality bearings for your hand spinner
• Material:7 Ceramic balls, inner and outer races are made of Stainless Steel
• High Performance Bearing for Extremely Fast and Long Spin Times
• Easily to DIY and enjoy the perfect spin
• Time to replace your bearings of fidget spinner!

Designed for Fidget Spinner Toy：High quality bearings for your hand spinner1MATCH