Solar vent day/night

Autonomous SOLARVENT.
It's the most advanced ventilation system powered by solar energy. Fitted with mirror polished stainless steel cup. ON-OFF switch. Equipped with NiMH rechargeable batteries which store energy during the day, ensuring 30 hours of operation without solar light. Equipped with 2 RIGHT/LEFT fans to let air in or out.

Cap Ø mm 217
Practice hole mm 119
External/internal overhang mm 71 total
Air circulation 20m3/hour