This is a compatible DC21 hepa filter that fits below the bin. It measures 152mm in diameter. There will be a rubber filter seal on the machine located under the filter. If not you can add a "DC21 Hepa seal

Also known as exhaust filter or post filter Located at the bottom of the machine.

This filter should be replaced every 5 years

This filter should be replaced when the motor is replaced

Fits Dyson Models

DC21 serial numbers starting with 384

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