Cord Protector Strain Relief Rubber Boot fits 12/3, 14/3 AWG Electrical Cords. Protect your power cords from breaking or twisting at the ends. The boots prevent the cords from making a sharp bend that can break the cord. WARNING: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www. P65Warnings. ca. gov.