Riccar Radiance and Simplicity Synergy Filter Set Simplicity SF9-1 Synergy HEPA & Charcoal Filter (3 Filter Total) Works with Simplicity Synergy Series Uprights including model X9 Also fits Riccar Radiance Includes 1 HEPA Filter, 1 Charcoal Filter and 1 Micro Filter HiFlow HEPA is ideal for allergy sufferers and charcoal helps with odors