Radiometer Eco friendly solar power engine.This fascinating solar powered radiometer is activated when it absorbs light.Tha vanes in the radiometer are dark and light in color. The dark vanes absorb the rays, the light vanes reflect the rays,and in cacuum condition the energy careates a spin.
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Radiometer Eco Friendly Solar Power Engine
New ArrivalOriginal price was: $38.70.$11.61Current price is: $11.61.
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