Check the listing for details. Rectangular Refraction Block, 75mm x 50mm x 12mm - Optical Glass - Eisco Labs. Condition: New. Listed at 9.99 USD. Rectangular Refraction Block, 75mm x 50mm x 12mm - Optical Glass - Eisco Labs Single rectangular block made from imported optical glass with optically worked surfaces. All angles accurately worked with edges slightly beveled. Bubble free glass. Block measures 3" (75mm) long, 1.5" (50mm) wide and is 0.5" (12mm) thick. Excellent for physics classrooms. Ideal for a variety of experiments in refraction and reflection. Great tool for photography 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. Product Details BrandEiscoManufacturerEiscoProduct TypeScience Classroom Optics KitsMpnPH0566A RECTANGULAR BLOCK || Rectangular block made from imported optical glass with optically worked surfaces. All angles accurately worked with edges slightly beveled. Bubble free glass3" LENGTH || Block measures 3" long, 1.5" wide and is 0.5" thickPHYSICS EXPERIMENTS || Excellent for physics classrooms. Ideal for a variety of experiments in refraction and reflectionPHOTOGRAPHY || Great for photography lighting and distortion effectsMANUFACTURED 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 Check out my other items. -Powered by