Justrite VaporTrap Filter reduces harmful VOC vapours found inside safety cabinets. Stainless steel wire mesh cartridge containing activated carbon adsorbs volatile organic chemical vapors. Cylindrical design allows 360 degree air flow for maximum surface contact. Activated carbon filter medium contained in a stainless steel mesh cartridge adsorbs the volatile organic chemical vapours found inside cabinets containing flammable liquids. Improves your work environment by reducing employee's inhalation exposure to VOC's and lowers emissions of VOC's into the atmosphere. Sturdy 4-inches by 5-1/2-inches magnetized base offers flexible placement anywhere within the cabinet. Date notation area on label serves as a reminder for replacement; life cycle varies based upon vapour types and concentrations. Measures 2-1/4-inches diameter by 8-3/4-inches length.