This is an original Bissell replacement part. The secondary filter is designed by the manufacturer for use in a wet/dry canister vacuum cleaner. This part is made of synthetic foam, and is used to help remove dust and debris from the air. This part is sold individually.
This is an authentic Bissell replacement part, sourced from the original manufacturer for use with central vacuums. The special primary filter is commonly used to prevent dust and debris from entering the exhaust air. This filter is available as an individual replacement part, please see model diagram for associative parts.