BRITA Purity C1100 Quell ST Filter CartridgeA genuine BRITA replacement filter cartridge. This cartridge uses advanced filtration technology to remove many impurities from water which can impair its taste and quality, including calcium, magnesium, lead and copper. Filtered water doesn't just help the quality of your food though it also prevents the build up of lime scale which can cause damage to vital kitchen appliances. Requires Purity C Filter Head (Item Code CU288)