Abec-3:

Ceramic Hybrid bearings feature ABEC-5 tolerances and premium features such as LLB seals, Graphite Nylon retainers, Silicon Nitride Grade 5 balls, and cryogenically treated steel races.

• LLB" type 2-lip low-contact Nitrile Butadiene rubber labyrinth seals
• Nylon/graphite retainer
• Realube Special Ceramic Grade 374 Grease

ABEC-5:

Bearings meeting the ABEC-5 standard. High precision Grade 10 balls are within 5/1,000,000″ round.

• High-carbon chromium alloy races
• Grade 10 balls
• Protective gray LLU seal facing outward, towards the elements, to reduce contamination from water or dirt
• Lighter-contact (less seal-drag) black LLB seals facing inward keep the 90% fill Mobil XHP 222 high pressure grease where it belongs