Triangular right angled prism with 90x45x45 degree angles. Made of high quality, polished acrylic material Prism measures 2.9" (74mm) in length and has a hypotenuse measuring 2" (50mm) Excellent for physics classrooms. Ideal for redirecting beams of light at a 90 degree angle, as a retro-reflector, as well as for a variety of other experiments in optics, light refraction, spectrometry and wavelengths Great for photography lighting and distortion effects 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 Single right angled prism measuring 2.9" (74mm) long, with a hypotenuse measuring 2" (50mm). Features highly polished faces and 90 x 45 x 45 degree angles. Made of durable, polished acrylic material. Excellent for physics classrooms. Ideal for redirecting beams of light at a 90 degree angle, as a retro-reflector, as well as for a variety of other experiments in optics, light refraction, spectrometry and wavelengths. Great for photography lighting and distortion effects. 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. They are manufactured with only the highest grade, raw materials and according to international quality standards to ensure that they can withstand use in even the toughest laboratory environments.