This is a genuine AAM finned aluminum differential cover kit that includes a rubber gasket, 14 mounting bolts, and a magnetic fill plug. This fits 1999-2014 GM 2500 and 3500 series trucks and 2003-2014 Dodge Ram 2500 and 3500 series trucks with the AAM 11.5 rear differential. This is the same cover that was an option from the factory on those trucks. Shrink wrap may come loose during shipping. If this is a problem, please don't buy it. Shipping is a flat $20.00 in the continental U.S.