While most of the industry uses 54" (tall) clear vinyl, we offer a very rare 72" clear vinyl for our enclosures. It is rare, because of the extruding process. What that means to you is taller clear vinyl enclosure windows for you and less canvas apron filler which makes fabrication less costly. For projects less than 9ft tall, we need only place canvas at the bottom requiring less sewing. Only for taller vinyl enclosures do we need to distribute canvas top and bottom.