The Bel-Art Scienceware 441700000 is a binder and set of slide holder pages to organize, display, and transport microscope slides. The binder is a standard, 30 x 23cm (12 x 9") (D x W), three-ring, loose-leaf binder. The set includes ten, 27 x 22cm (10-1/2 x 8-1/2") (D x W) vinyl microscope slide holder pages with pockets with a white back and transparent front for visibility of 160 slides. (D is depth, the horizontal distance from front to back; W is width, the horizontal distance from left to right.) The center flap of the pages holds slides securely and folding the page along the middle crease allows slides to be conveniently retrieved. Additional microscope slide holder pages available (sold separately).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.What's in the Box?(1) 3-ring, loose leaf binder(10) Vinyl microscope slide holder pages Research, industrial and healthcare professionals rely on SP Scienceware for their sample handling needs. Sold worldwide, Bel-Art and H-B Instrument brand laboratory supplies include over 5,000 items from safety wash bottles to fume hoods, thermometers, racks, desiccators, hydrometers, ice buckets, scoops and spoons. Custom calibration services, plastic molding, specialty coatings and wire manufacturing are also available. Wilmad-LabGlass brand laboratory glassware complements Bel-Art and H-B Instrument with over 7000 items including NMR and EPR consumables and specialty glassware, as well as custom fabrication for individual glassware, glass repair services and OEM glass parts. SP Scienceware is a division of Warminster, PA based SP Industries which also include SP Scientific laboratory, thermal management, and pharmaceutical production equipment and SP Ableware aids for daily living.