Swissgold Best Universal Gold Cone 6-12 Cups Coffee Filter
The KF 4 goldfilter is our classic runner in permanent coffee filters. Fits drip coffee makers with a 6-12 cup capacity and goes also for bigger volumes with the adaptable ring.
Source: http://www.roaste.com/product/Frieling/Swissgold-Best-Universal-Gold-Cone-6-12-Cups-Coffee-Filter