Polyethelyne recovery tank. These units are equipped with true Dual ULPA Filters (U15) located downstream of the motor. These units are EMI/RFI Shielded and will not disrupt computers and sensitive electronic equipment. Static free and ESD safe these units have an electrical resistivity of less than 10 Ohms. Any static produced while vacuuming is quickly and effectively discharged to ground. These units are cleanroom compatible and can be used in the pharmaceutical industry. These units were designed for general cleanup in contamination controlled environments. These are wet & dry recovery vacuum cleaners. All of our ULPA vacuum cleaners are Aerosol Leak Tested before leaving our facility.