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 making the powerhead elligible for IP6X. This unit is static dissipating and conductive (Category 3 - Zone 22 (Dust)) and can be used for general maintenance. This unit cannot be used to recover conductive or combustible dusts. 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.