Spectracide Carpenter Bee & Yellow Jacket Killer Spray, 16 oz. is specially formulated to effectively eliminate carpenter bees and ground-dwelling yellow jackets. This powerful spray works on contact and continues to kill insects for up to three months, thanks to its active ingredients Prallethrin and Lambda-Cyhalothrin. The expanding foam reaches deep into hard-to-access areas where these pests nest, ensuring thorough treatment. Conveniently packaged in a ready-to-use 16 oz. aerosol can, this product an easy and efficient solution for controlling these troublesome insects.