Crooke’s Radiometer

As manufacturers and exporters, we can offer you novel, educational toy liked by kids and adults alike, Crooke's Radioeter, a set of 4 vanes, balanced on a fine needle, fitted inside 80 mm evacuated glass shell, fitted on stand, starts rotating fast when placed only in the sun shine, to show conversion of heat energy into mechanical energy, available at all toy shots, stores, chain stores, etc