Unique Truck Accessories RB257D-BT 57In Invin Shape Goose Neck/Fifth Wheel Tailgate Box-Black Texture Coat 813408023454 Fifth Wheel Toolboxes Length 59, Width 20, Height 20, Weight 53. 57In Invin Shape Goose Neck/Fifth Wheel Tailgate Box-Black Texture Coat, Fifth Wheel Toolboxes.