Pet odor eliminator with N50 Odor Eliminator Exclusive for PuraMax Self-Cleaning Cat Litter Box, Cat Toilet Odor Control for PETKIT PuraMax Automatic Litter Box. HomeFio N50 odor eliminator is specially designed for PETKIT PURAMAX automatic self-cleaning cat litter box. It can effectively control odor for automatic litter box. One piece can be used for 30 days, package includes 6 pieces，use for half year (six months). Please note that the N50 odor eliminators are each piece is individually sealed, better preservation and protection from volatilization. Easy to replace, very convenient and time saving. HomeFio 6 Packs Update N50 Odor Eliminator Exclusive for Pura Max Self-Cleaning Cat Litter Box - Cat Toilet Odor Control