KidWind Advanced Wind Experiment Kit, wind turbine technology, Test different blade designs, gear ratios, generators, and devices to measure electrical and weightlifting power, for College, High School, and Middle School
Y-Shaped Flint Glass Connecting Tube, Arm Length: 1 1/2in, with a 120 deg angle provides safer connections as the ends have constrictions to hold rubber tubing securely, Made from quality flint glass, Size: 1/4in ID X 5/16in OD (7.9mm)