Size: 4 oz Spray Litter Extender every time you scoop to leave the litter box cleaner so you dont have to throw out your litter as often. BoxiePros boosted blend of probiotics immediately target odors anytime waste is present. Litter extender contains an odor encapsulate to surround and block odors from escaping. As an added bonus, Litter Extender cleans your litter on a microscopic level 24/7, helping to reduce the spread of unseen waste to kitchen counters, beds, and other areas of the home. Cleaner Paws = Cleaner Home