Our replenishment pack for your A24 trap includes everything you need to keep your rats and mice under constant control for six months. To keep your trap firing and providing constant control, replace your ALP and CO2 every six months or once you've reached 24 kills (whichever comes first). Once installed and activated, the Automatic Paste Dispenser (ALP) refreshes your trap with nut butter paste for rats and mice, steadily across six months. Knowing that your trap has fresh paste all the time, increases your trapping success.