HEPA  Carbon Filter modified for Noctua industrialPPC NFF12
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HEPA & Carbon Filter (modified for Noctua industrialPPC NF-F12)

Remixed cover from the great HEPA Carbon Filter by Printer Box models ...

similar models —

HEPA & Carbon Filter (modified for Noctua industrialPPC NF-F12) alternatives
HEPA  Carbon Filter
Printer Box
HEPA Air Filter Mount
shortround1911