6 month top up - nut butter. Our replenishment pack for your a24 trap includes everything you need to keep your rats and mice under constant control for 6 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 lure dispenser (alp) refreshes your trap with nut butter lure for rats and mice, steadily across 6 months. knowing that your trap has fresh lure all the time, increases your trapping success. whats in the box: 1 x co2 canister (24 kills per canister) 1 x automatic lure pump - nut butter