Our large portable shelter sizes are crafted in 7-foot increments to your specifications. Commonly used lengths are 14 or 21 feet. The shelter comes with an adjustable vent on the back and 4×4 wooden skids with pull straps for portability, along with 10” steel wall protectors on the inside, braces and bolts, and a spreader bar for the front. Our shelters are extremely durable, made with heavy galvanized corrugated steel with an angle iron frame. These shelters require some assembly and are shipped in 7-foot sections. Please note that the total height is 6’ 3” with a 5’8” clearance under the cross brace inside.