Large Plain Glass Microscope Slides. 2" x 3" (50 x 75mm), Approximately 1mm thick. Premiere brand slides are made of water white, corrosion resistant glass with smoothly polished edges and slightly clipped corners. Suitable for all medical applications at economical prices. Made in accordance with international standard ISO 89037/1 and to the IVD (In Vitro Diagnostics Medical Devices Directive 98/79/EC). This item is for one box of 72 slides. Case quantity equals 20 boxes. Dimensions, 75mm x 50mm x 1mm (3.1 x 3.1 x 2.1 inches), 1.6 pounds.