This SEBO Hospital-Grade Microfilter is for use in their C series canisters to keep them performing well. This fan-fold filter in a green frame also contains activated charcoal which is great for trapping pet odor as well as other household odors. It can be used instead of the fan-fold C3 Series Exhaust Microfilter #6033AM in a green frame that is located along the side of the vacuum. For similar products see our list of current SEBO Vacuum Supplies.