Chemex filters are the secret to this brewer. They are between 20 and 30 percent heavier than typical coffee filters, ensuring that all of the sludge is caught in the filtration process, creating an extremely clean cup. In addition, the extra weight helps to ensure that the water is in contact with the coffee for the correct amount of time. 6-10 Cup Filters Each box contains 100 square folded filters and can be used for all Chemex brewers except the Pint Coffeemakers. Cone-shape ensures uniform extraction for pure coffee flavor Thicker (20-30% more than the competition) specialty fiber filter design keep bitter elements, oils, and grounds in their place (and out of your cup) Prefolded for convenience Will fit most other cone-shaped filter coffeemakers Fits all CHEMEX® Coffeemakers except CM-1, CM-1C, CM-1GH How to Use