Kills roaches and other various pests resistant to typical sprays. Quick knockdown flushes roaches from their hiding places and keeps on killing roaches with residual action for up to 7 weeks. Also works on ants, spiders, scorpions, black widow spiders, and other listed crawling insects. Aerosol valve works upright or upside down. 16 ounce aerosol. Active ingredient: ETOC & Esfenvalerate.