Compatible models: For Shark BAGLESS upright VACUUM CLEANER AH400 AH400C AH401 AH401C AH405 AH450REF AH452 AH452W AH454Q. Replace Part number:# XFFH400 XEXFH400. Save with a new air filter, when the air purifier's air filter is clogged or dirty, it may make its job more difficult, and eventually increasing electricity use.
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