With this slip-on attachment you can convert our Micro-Slide Viewer into a handy low-power microscope for examination of solid objects, Specimens are placed on the white reflector of the Micro-Slide Viewer, Focusing is performed in the same manner as with the Micro-Slide Viewer used by itself, Objects up to 3/4 inch thick can be brought into sharp focus, Made of impact resistant styrene The Macro-lens is completely washable and measures only 4-7/8"" long, American Educational Products have a lead ship time of 21 days, SKU: AMED1865