Certified sustainable activated coconut shell carbon using an ion exchange, Plant-based sugar cane makes up the outside housing, Each filter lasts for 151 litres, Filters Mercury, Chlorine, Zinc, and Copper. Colour: White, Clear, Material: Plant-based Sugarcane Housing, Coconut Shell Carbon, Product Dimensions: 12cm (L) x 8cm (W) x 7cm (D).