U/L Listed for use in Class 1 - Group D atmospheres, Class II - Group F & G atmospheres. Constructed of 22 gauge, non-sparking stainless steel. Ideal for pick-up of hazardous material such as flammable liquids, finely pulverized dust and more. Heavy duty vacuum operates wet or dry. Must use 490006 or 490007 tool kit ONLY. UL Listed.