Stainless steel SAE 430 body and recovery tank. Contains a true HEPA Filter (H14) located upstream of the motor. 2 more HEPA filters (H14) are included within the powerhead. This unit is static dissipating and conductive and can be used for general housekeeping. With a powerful suction this unit is designed for industrial applications. All of our HEPA vacuum cleaners are Aerosol Leak Tested before leaving our facility.