ABEC-5 high-precision bearing, Z3V3 vibration level, According to BVT testing, the noise level of these bearings is approximately 25 decibels. The inner ring of the bearing adopts a V-shaped groove design, which better protects against dust entering and extends the service life. The two sides of the bearing are sealed with rubber and made of chrome steel, which is sturdy and durable. These bearings have low noise and friction coefficient, Suitable for various electrical appliances, powertools, garden machinery, etc