Rectangular Refraction Cell, Material: acrylic rectangular, Color: clear, excellent for showing refraction and internal reflection in water, and to measure its refractive index, has uniform wall thickness to eliminate distortions, Dimension: 6X3X6.2 CM
Wind To Hydrogen Science Kit, Turn Wind Power Into Hydrogen Energy, Build Your Own Hydrogen Fuel Cell Powered Inventions, Revolutionary New Horizon Wind Turbine, Includes HorizonS Complete Curriculum On Renewable Energy On Cd, Demonstrate The Principles