Check the listing for details. Rectangular Refraction Block, 100mm x 75mm x 18mm - Acrylic - Eisco Labs. Condition: New. Listed at 15.19 USD. Rectangular Refraction Block, 100mm x 75mm x 18mm - Acrylic - Eisco Labs Single rectangular block made from high quality acrylic. Block measures 4" (100mm) long, 1.5" (75mm) wide and is 0.7" (18mm) 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 KitsMpnPH0568B RECTANGULAR BLOCK || Rectangular block made from high quality acrylic4" LENGTH || Block measures 4" long, 1.5" wide and is 0.7" 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