What makes CHEMEX® Bonded Filters the real deal? 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 DETAILS 100 filters per pack. FS-100 All CHEMEX® Coffeemakers used together with the scientifically designed, patented CHEMEX® Bonded Filters, will guarantee that our pour-over brewing process will deliver the perfect cup of coffee, without any sediments or bitter elements.