Durable paper construction * Fits all Chemex coffee makers except CM-1, CM-1C, CM-1GH * The Chemex filter is folded into a cone shape, exactly as in laboratory technique * Assures uniform extraction since the water filters through all the grounds on its way to the apex of the cone * Chemex filters are 20-30% heavier than competitive brands and remove even the finest sediment particles, and well as oils, and fats