Harris spider killer kills spiders on contact. Also effective against ants, water bugs, fleas, crickets, and other insects. For indoor and outdoor use. Nonstaining and odorless. Offers long-lasting protection. Active ingredient: Deltamethrin. Size: 32 Oz. Concentrate or Ready To Use: Ready To Use Application Type: Trigger Spray Product Form: Liquid Indoor/Outdoor: Indoor/Outdoor Safe For Edibles: No Safe For Pets: No pack of 12