CarCapsule CCSH18 18' Indoor Showcase Overall size 18' 8"- 224"x111"x 78" (length x width x height) Capsule's internal air changes 3 to 4 times an hour Durable 10 MIL. Double polished radio frequency welded PVC 100% nylon zipper helps to prevent scratching and keeps rodents out Material that is mildew, abrasion, and flame resistant