These Cavity Microscope Slides feature precisely ground and polished spherical depressions—also known as depression, concavity, or well slides. The concave wells are ideal for holding liquid samples, tissue cultures, and other specimens requiring containment. Each slide measures 3″ x 1″ (75 x 25 mm) with a nominal thickness of 1.25 mm (ranging from 1.2 to 1.3 mm). The wells have a diameter of 15–18 mm and a depth of 0.6–0.8 mm. Slides are pre-cleaned, autoclave safe, and ready for immediate use.