Shark HE405 air purifier filters

Shark HE405: the hepa filter is part HE4FKBAS or HE4FKPET. Source: Shark, checked November 6, 2026.

1HEPA filterHE4FKBAS

Part numbers come from Shark (source 1, source 2), checked November 6, 2026. Amazon buttons open a search for the part number; we may earn a commission.

Where the model number is

On a label on the bottom or the back of the purifier.