Polished Look with Full Visibility and a Distinct Air of Dependability. The Fast-Fold® Pneumatic door is a classy, yet economical alternative to impact doors and strip curtains. Running on standard shop air with very few moving parts, it is as dependable as you can get. Plus, with its clear PVC panels, it also offers full visibility for convenience and safety. It is routinely used in a wide variety of interior warehousing and manufacturing environments. And when equipped with an optional stainless steel package, the Fast-Fold Pneumatic can even be applied in select food processing, pharmaceutical and clean room applications.