The product is a set of rear base brake disc rotors for Tesla Model 3 and Y vehicles, with part numbers 1044631-00-D, 104463100D, 1044631-00 D, and 1044631 00 D. Made of cast iron, the vented rotor style provides optimal braking performance. Manufactured by Tesla in the United States, these brake disc rotors are a direct fit for the specified vehicle models and come in a pack of 2. The uncoated finish ensures durability and longevity, making them a quality replacement part for maintaining the braking system of Tesla vehicles.