Can-Filter 33 w/ out Flange 200 CFM $0.00 Default Title - $0.00 Quantity This product is currently sold out. Please fill in the form below if you'd like to be notified when it becomes available. Can-Filters® provides one of natures best odor control materials, activated carbon. Can CKV-4 (carbon type) is specially developed for this purpose. All filters include a low resistance pre-filter.