The object to be viewed (“specimen”) on the microscope is typically placed on the middle of the slide with a smaller sheet of glass on top. The smaller sheet is called a “cover slip” or “cover glass”.
The cover glass serves protects the microscope’s lens from contacting the specimen, and creates an even thickness for viewing.
Range of sizes available
7101 MICROSCOPE SLIDES PLAIN 3″ X 1″ 50S
25.4×76.2mm, 1mm-2mm thick.