Eureka 60286C HF-1 True HEPA FilterEureka 60286B-6 HF-1 True HEPA Filter Features:; For upright vacuum cleaners 6140-6160, 6235, 6978, 6980, 6983A (2910-8420) and 6984A (2910-8321), 6993, 6994, 6997, 6998 series; Retains 100% of dust mites, grass and ragweed pollens plus particles 75 times small than the diameter of a human hair