The Silent Hitch Pin is produced in three (3) different sizes, 2in, 2.5in, and 3in corresponding to standard hitch receiver sizes. In most cases, customers should measure the height & width of the inside of the their hollow hitch receiver to determine which size hitch receiver is installed on their vehicle. In some instances however, a larger Silent Hitch Pin is required for vehicles that have thick hitch receiver side walls than that specified by the diameter.