BIG D® METERED INSECTICIDE is an EPA registered aerosol that may be used in commercial food service and preparation areas of milk houses, hospitals, hotels, motels, factories, stores, ships, clubs, restaurants or schools. This blend of natural pyrethrin, piperonyl butoxide and MGK® 264 is classified F-1 by the USDA and is effective on flies, mosquitoes, gnats and small moths. Great for anywhere insects are an annoyance, one can will treat up to 6,000 cu. ft. of air space for 30 days, 24 hours a day.