CGAC Series filter cartridges has a coconut base carbon that effectively reduce unwanted colours, tastes, and odours including residual chlorine from your drinking water. They are designed to allow maximum contact between the water and carbon granules, ensuring optimal adsorption and clean tasting water. Water comes out refreshingly fresh and clean tasting. Guaranteed High Quality and Safe Specifications: Length: 20" (50.8 cm) Diameter: 4.57" (11.6 cm) Fits Standard 20" Big Blue (BB) Filter Housings from any brand. This filter will not impart any taste, odour, or colour to the water when used within the recommended temperature. A Quality Product brought to you by WaterCare. #WaterCare #USPure #Water #Filtration #Filter #Activated #Carbon #Cartridge #20 #BB #20BB #Replacement