✅Insect-Proof Flap – Automatic check valveblocks mosquitoes & dust. 📦 Includes: 1x Vent Fan (size option) + Mounting Screws. ✅Pure Copper Motor –30% more efficient than aluminum-core fans. 🌀 High-Speed Extractor Fan | 4"/6"/8" Sizes | Mosquito-Proof & Fire-Resistant 🌀.
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