Critter-Maxx is the first and only effective FIFRA varmint repellent developed for use with the EZ-FLO line of injection systems. Comprised of a proprietary blend of the US Environmental Protection Agencies "known safe" ingredients, Critter-Maxx will deliver the premium results that are expected from the EZ-FLO brand. You can use Critter-Maxx to repel a wide variety of pests including but not limited to the following: gophers, moles, voles, & deer. Scent based repellent insures a safe and effective barrier for your entire yard.