• Nispira HBP04 2-in-1 True HEPA Air Filter Replacement Compatible with Dyson Air Purifier HP04 HP06 HP07 HP09 HP10 HP4B TP4A TP7A TP04 TP06 TP07 TP09 TP10 PH01 PH02 PH03 PH04 PH3A 970341-01.
• Preliminary net filter outside prevents hair, debris etc entering into the air purifier.
• HEPA filter removes up to 99.97 percent of airborne particles size as small as 0.3 microns.
• Activated charcoal filter helps deodorize any unfavorable household smell and removes smoke, chemical VOCs etc. 
• Dimension 3.9"L x 8.1"W x 8.6"H". Suggest replacing the filter every 6 months the most to optimize the performance. Quality meets or exceeds the leading national brand's.

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