The Bel-Art Products 445570000 microscope slide holder tray is made of plastic for durability and holds up to 12, 25 x 75mm (1 x 3") microscope slides (sold separately). It has inclined ribs to hold the slides securely standing on their ends.

Bel-Art Products manufactures scientific products, including labware, testing equipment, and safety supplies, under the Bel-Art and Scienceware brands. The company, founded in 1946, is headquartered in Wayne, NJ.