30 Pcs Bick Bicycle Repairing Parts 10mm Dia Steel Ball BearingsIdeal for rebuilding your bicycle's bottom bracket. Come with 30 pcs in one bag which is enough replacement parts for your bike use. For CALIFORNIA residents only: WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Please note that by posting this Proposition 65 warning, we are notifying you that one or more of the Proposition 65 listed chemicals may be present in a product. With Unique Bargains' products, the exposure to these chemicals may be of no significant risk to you, but out of caution, we have elected to place this warning on our site to make sure our customers are informed. You can find more information at http://www. oehha. ca.gov/proposition-65/about-proposition-65.