Hoover Part # 40110006, 38766021 for Windtunnel Self Propelled, Bagless, Tempo, Widepath, Empower, Foldaway, Comparable 3 Layer Filter. A Home Revolution Brand Quality Aftermarket Replacement 2PK QUALITY AFTERMARKET HOME REVOLUTION REPLACEMENT: Made to Fit Hoover Windtunnel Self Propelled, Windtunnel Bagless, Tempo, Widepath, Empower and Foldaway Models. NOT OEM. METICULOUSLY DESIGNED TO COMPARE: Compare to Part # 40110006, 38766021. ESSENTIAL FOR ALLERGY SUFFERERS: Breathe clean, fresh air and protect your family from allergens and other airborne particles while absorbing odors! CLEAN HOME, CLEAN MIND, ENVIRONMENTALLY FRIENDLY: Home Revolution Brand filters detoxify the air and exhilarate the home and mind. With a powerful style of manufacturing, we link clean air and Earth-friendly intention together! 100% SATISFACTION GUARANTEE: Or your money back!