Litter Robot 4 OdorTrap Holder by Whisker, Holds Up to 3 Packs Eliminate Tray Odours, Custom Fit for 4, Pair with Remove Cat Smell

- It replaces carbon filter to block the litter box odour - Fit up to 3 odour trap packs so your guests won't smell any pongs- Installing it is super easy - simply snap it directly over the filter cover- It's compatible with Litter-Robot 4 model