Feature(may vary by option.)

●Bearings
●Dimensions: 8 x 22 x 7mm (Inner Diameter: 8mm, Outer Diameter: 22mm, Width:7mm)
●Material: Blacken Chrome steel(G cr15) inner& outer rings Silicone Nitride CeramicaSi3N4 6 balls
●Retainer& Seal Brown Nylon cage silver Iron Seal on one side
●Features: High precision, fast speed,self-lubricated!

[2pcs Si3n4 6 Ball 608]

Description

Bearings
1. Si3N4 Black Ceramic & Zro2 White Ceramic 6 balls Skating Spinner Bearings
2 Precise and High Speed 6 beads design
3 Single side Dustproof
4. Anti-rust ,self-lubricated ceramic balls
5. Excellent for professional speed Skating players, Fidget Hand spinner...
6. Ceramic Bearings can effectively avoid jumping skating and fierce playing!
7. Faster and better performance
1) 1pc Si3n4 ceramic 608 bearing
Tips:Si3n4 balls can bear higher temperature, when the bearing is under very fast speed rotation,the balls wont expand.
So that it can help to ensure a faster speed and longer life of the bearing.
2) 1pc Zro2 ceramic 608 bearing