American Educational Glass Microscope Slides, Double Cavity, 76.2mm Length x 25.1mm Width (Box of 144) 25 x 75mm glass microscope slide for use in viewing applications Slide thickness range of 1.01 to 1.02mm Single or double cavity for holding liquids and cultures for microscopic examination Frosted glass end for use in labeling Packaged in 2 boxes, each with 72 slides