Made of heavy duty plastic. This unit includes a true HEPA Filter (H14) located upstream of the motor. This unit is designed for the recovery of lead, asbestos, silica and other toxic/nuisance dusts. Equipped with a 4-stage filtration system which consists of a HEPA Filter, main filter, disposable filter bag and foam exhaust filter. The disposable filter bag allows for easy and safe disposal of recovered materials. All of our HEPA vacuum cleaners are Aerosol Leak Tested before leaving our facility.