Microscope Glass Slides - Frosted, PK- of 72-EIS-BI0084B offers a thoughtfully designed, durable resource for hands-on learning. Pre cleaned glass slides Ground and polished edges Optically flat, high quality glass 75x25mm (1"x3") Pack of 72!. 72 high quality frosted glass microscope slides with ground and polished edges. 1x3" sides, pre cleaned and optically flat. Made of soda lime glass.