Micro fine flavor enhancing perforations release coffee’s full flavor, while filtering out impurities for a richer tasting cup of coffee. Double crimped filter design for extra strength and durability is guaranteed not to burst. 100% chlorine and Gluten free. Kosher certified. Convenient package of 100 filters. Melitta number 4 filters fit all coffeemakers designed with a number 4 cone – 8 - 12 Cup electric machines.