Like our durable full size boxes made by Heritage, these share the same durable construction and dependability. Made with exterior luan sheeting which is sandwiched by 3/4 inch closed cell insulation that will provide cool in the summer and heat in the winter. Finished with a bright brushed aluminum, these boxes are definitely an eye catcher. The one dog box will take up less room, without sacrificing the top waterproof storage capability. The storage lid features a key lock and is supported by a 50lb gas shock. 21" x 38" x 25.5"