HARRIS Boric Acid Roach and Silverfish Killer Powder w/Lure (16oz) 1.Long Lasting - Continues to kill roaches, palmetto bugs, water bugs and silverfish for weeks after application as long as it's kept dry 2.Fast Acting - Insects coming into contact with the powder will die within 72 hours after initial contact 3.Easy Application - The puffer with extended straw makes application quick and simple for difficult to reach areas 4.Contains Irresistible Lure - Harris food grade lure attracts roaches from their hiding places 5.EPA Registered - Made in the USA and Registered with the Environmental Protection Agency (No. 3-10) for use in homes with people and pets