This benchtop beta shield measures 610 x 457 x 305mm. It is specifically designed for use on the laboratory benchtop during procedures which require the handling of beta-emitting isotopes. It is made of 3/8 inch (9mm) thick acrylic. It is transparent and free-standing. The angled top allows contents of tubes located behind the shield to be viewed from the top while the shield protects the lab worker. The 12 inch (305mm) deep base provides a large flat work surface and minimizes the risk of hot spots on the lab bench. Meets OSHA Standard 29 CFR Part 1910.1030 for use as protection against bloodborne pathogens. WARNING! Radioactive waste should never be stored on the benchtop for long periods of time and should be disposed of properly. Proper handling and storage of isotopes will minimize exposure to radiation. For standards related to exposure refer to United States Nuclear Regulatory Commission Rules and Regulations Title 10 Chapter 1 Part 20. Dimensions: 610 x 457 x 305mm (24H x 18W x 12D inches). Thickness: 3/8 inch (9mm). Material: acrylic. Sold individually. Nalgene #: 6700-2418.