The carrier transporting the shipment. This could be UPS, FedEx, USPS, or a common carrier (trucking company) such as Reddaway, USF Bestway, Roadway etc. As a rule of thumb, your order will be shipped UPS if possible. Many items are too large and/or too heavy for UPS to handle. These items normally ship via common carrier. The carrier we select for you depends on the destination you specify. We will leverage our special rates and long-standing relationships with these companies to obtain the best rate possible for you and your destination. If you are purchasing multiple items we will always attempt to package them together to obtain a savings on shipping costs.