Fits original manufacture part numbers below: # 8.600-522.0, 5036ER, 5036AM, Kenmore 50015, 50016 or 20-50016, Hepa 5827 , Windsor Part 5301ER Designed to fit the vacuum models listed below and more: Windsor/Sebo/ Kenmore Vacuums: Style Model Numbers SEBO Automatic X series All including X1, X4, X5 Windsor Sensor Series S12, S15, XP12, XP15, Xp18 SEBO Essential G series All Essential G1 series All Kenmore All models that use type X filters Dimensions: Micro filter - Bottom Diameter 1 ¾", hole diameter 1 1/4" height approximately 14 ½" Curved Foam filter - 3 7/8" x 2 5/8" For best results, replace Microfilter when discolored. 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.