Bona Hardwood Floor Cleaner Cartridge is a replacement cartridge for your next generation Bona Spray Mop. The flat bottom and wide opening provide an easy refill experience. The innovative bag-in-bottle design allows for an even spray every time. The residue-free, fast drying solution cleans hardwood floors by gently and effectively removing dust, dirt and grime to reveal the floor’s natural shine and beauty. A pH neutral formula maintains your floor’s finish and protects from discoloration and harm. 34 oz refill cartridge.