Four custom-length U-Bolts included with the purchase of the High Clearance Leaf Spring Bolt Plate. The custom specifications on these U-Bolts is a 9/16 inch Diameter Round U-Bolt with Deep Nuts and Washers. A Grade 5 strength steel and an oil finish. An inside length of 6-inches and an inside width of 3.5-inches. This product aids with the management of the number of parts kept in stock. Helping to reduce the amount of time from when customer orders and when shipped product is received.