The CleanSpace Ultra Cleaning & Storage Plug is designed to be used with the CleanSpace PRO and CleanSpace ULTRA Power Systems. It is a tool used to seal all the openings on the CleanSpace PAPR unit for storage during and after decontamination. Do not wear the respirator when the plug set is in place. The Plug Set is made of nylon and silicone and is safe for use in decontamination operations.