Fits original manufacture part numbers: 62396, 62396-1, 62396-12, 73734-2, 73734, 2316911737, 023169117372, 73824, 62731, 62731A, 62731B, DCF-10, DCF-14, DCF10, DCF14, 62731-1, 62731-12, 470953, 62731A-2, 62417, 62731B-Z, and more. Designed to fit Eureka Lightweight upright vacuum models: Optima 430 series including 430, 431a, 431ax, 431axz, 431b, 431bx, 431f, 433a, 433b, 433be, 433bet, 437, 437axz, 437az, 439az, 437AZ, 437AZE, 437-AXZ, 437-AZ, 437-AZE, 431A, 431AE, 431AXZE, UK431A Optima Pet Lover 439AZ. HEPA filtration systems trap and seal in 100% of dust mites, pollens, ragweed, mold spurs, microscopic particles, bacteria, dust mites, germs as small as 0.1 micron., other allergy causing agents, and 99.9% of pet dander.