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)
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