Sprite Bath Ball Replacement Filter neutralizes chlorine and filters undissolved solids for easier breathing and smoother skin and hair. Chlorgon and Mineral Beads help to filter most gases like chlorine and enhance the alkaline pH of water. Each cartridge lasts about 50 baths or 6 months. Size: 1" x 3 5/16" (2.54 cm x 8.41 cm). The bottom is rounded to fit the bottom of the Bath Ball housing.