Justrite® VaporTrap™ Filter reduces harmful VOC vapors found inside safety cabinets. The activated carbon filter medium contained in a stainless steel mesh cartridge reduces volatile organic chemical vapors inside cabinets containing flammable liquids. Unique cylindrical design provides more adsorption surface area. Magnetized 4" x 5.5" (102mm x 139mm) base attaches easily and can be repositioned anywhere.