Made of heavy duty plastic. Also available with a stainless steel recovery tank. 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 3-stage filtration system consisting of the HEPA Filter, main filter and disposable filter bag. The disposable filter bag allows for the easy and safe disposal of recovered materials. All of our HEPA vacuum cleaners are Aerosol Leak Tested before leaving our facility.