12mm Abec five precision bearings. Good for replacing lost or damaged wheel bearing. The packet comes with 8 bearings. That's good for, 4 complete wheels. Availability: Usually ships the next business day. Wheel bearings bearings$18.95 Have a Question? Email us. Hours: Monday thru Friday 9 AM to 5 PM (EST) Closed Saturday and Sunday Web www.mountainboardshop.com