50pcs original NSK high speed bearing 693ZZ 3*8*4mm R-830ZZ precision miniature ball bearings 3x8x4 mm motor fan bearing 50pcs original NSK high speed bearing 693ZZ 3*8*4mm R-830ZZ precision miniature ball bearings 3x8x4 mm motor fan bearing. Sale price : $47.12 Category : Sports & Entertainment