The Thomas round glass cover slip keeps solid specimens flat and wet specimens compressed to a layer of even thickness when used with microscope slides (sold separately). The container allows removal of a single cover glass without touching the surface. This glass cover slip conforms to Interim Federal Specification NNN-C-001434A and is suitable for use in a variety of microscopic examination applications.

Thomas Scientific manufactures instruments, equipment, supplies, and chemicals for laboratory and scientific applications. The company, founded in 1900, is headquartered in Swedesboro, NJ.