2 in 1 mosquito killer power baits for use in MK100s. Exclusive combination of octenol and lactic acid lures a wide variety of mosquitoes. Attracts hard to catch mosquito species such as the Asian Tiger and those that may carry West Nile and EEE. Slow release. Each lure lasts 30 days. Active Ingredients: 1-Octen-3-ol 6.531 percent and Lactic Acid 5.331 percent.