These tunnel boxes are a good addition for more storage space. Use over fuel tanks, battery boxes, ect or as a new build. They have a flat top and bottom as well. Constructed from 3/16 alum with chain racks/baskets and more storage options. Stock height is 39" and are 94 1/4" wide. Other sizes can be made. All boxes are made to order. You can expect a two/eight week completion time. Price does not include shipping. Please select length of box in upper right corner.