Lifesystems Mosquito Coils release an effective insecticide, protecting against mosquitoes and other flying insects. When lit, the coil lets off an insecticidal vapour. Each coil provides up to 4½ hours protection. Recommended for outdoor use.Recommended for outdoor useTreats 20m³ / 700ft³ approx.Prallethrin 0.036% (w/w) active ingredienPack contains 10 coils and 2 standsActive Ingredient: d-AllerthrinDimensions: 145 x 135 x 15mmWeight: 120g