WZZG 2PC/lot Thin-walled deep groove ball bearing 6801-2RS bicycle hybrid ceramic bearing 12*21*5mm

WZZG hybrid ceramic bearing 6801-2RS

Item number: 6801-2RS

Structure: deep groove ball hybrid ceramic

Inner and outer ring material: bearing steel

Ball Material: Black Ceramic Si3N4

Inner diameter (d): 12mm

Outer diameter (D): 21mm

Width (B): 5mm

Closure: Rubber Seal (2RS)

Bearing grade: ABEC-7

Cage: Nylon cage

Lubrication: Grease

Gap: C0