• Replaced purifying refills (4 bottles) for PETKIT Pura X, Pura Max & Pure Air automatic cat litter box, and also fits for K3 air purifier smart spray.
• 50ml/bottle*4 bottles.
• Effective Deodorization: Target smelly molecules and break them down, always keep air fresh in your room..
• 100% Safe: The main ingredient is plant extract, no harm to pets and human body.