My friend, please look before you buy itif the demand is very large, you can contact the seller, the price can be favorable.Level description:ABEC-1=NORMAL CLASS=P0;ABEC-3=CLASS 6=P6;ABEC-5=CLASS 5=P5;ABEC-1:The size accuracy is less than 0.05mm,. It is suitable for low speed and low requirements. Such as: low speed transmission equipment, casters, children's cars, toy cars and so on.ABEC-3:The size accuracy is less than 0.01mm, the hand feels smooth, the speed is less than 6000rpm, the noise is low, and the service life is long. It is suitable for motor, toy model, automobile, electric tool, pneumatic tool, telecommunication equipment, fitness equipment, sports apparatus and so on.ABEC-5:The size accuracy is less than 0.005mm, the hand feels smooth, the speed is more than 6000rpm, the noise is low, and the service life is long. It is suitable for high speed motor, high speed model, instrument and instrument, precision equipment, high grade toys and so on.Material: high quality bearing steel is used in the bearings of our company.Our company produces high speed(The speed is over 30000
). ABEC-1,ABEC-3,ABEC-5,ABEC-7,ABEC-9,ABEC-11,Please contact the seller if you need it.