EQUILATERAL PRISM || Triangular equilateral prism. Made of optical quality glass 3" LENGTH || Prism measures 3" (75mm) in length. Each face measures 1" (25mm) PHYSICS EXPERIMENTS || Excellent for physics classrooms. Ideal for a variety of experiments in optics, light refraction, spectrometry and wavelengths PHOTOGRAPHY || Great for photography lighting effects. These prisms will create a rainbow of color when used with any standard light source MANUFACTURED BY EISCO LABS || Eisco Labs proudly manufactures its own products using state-of-the-art equipment, and following the highest standards of quality control. Each product is carefully designed by a team of laboratory professionals and experienced engineers with quality and durability in mind