Smartide Filter Kit for Dyson Dc17 Includes Washable Pre-motor Filter (911236-01) and Post Hepa Filter (911235-01) replacement Washable Pre-Filter & Non-Washable HEPA Post-Motor Filter Fits All Dyson DC17 (DC-17) Vacuum Cleaner Models Compare to Part # 911236-01 911235-01 Micro allergen filter which captures 99% of dust particles making essential to homes with allergy suffers. Superior quality replacement washable pre motor & post motor HEPA filter Designed & Engineered By Smartide