Special Microscope Glass Case It is generally used in cooperation with a base glass. Good substitutes and articles for the school laboratory. Size: 22x22mm, thickness 0.13-0.17mm Material: Glass Color: transparent: 100pcs/small box: Making microscopic observation of specimens1, so that the object under observation forms a thin film, easy to transmit light, easy to observe; 2, make it relatively constant; 3, facilitate the application of capillary phenomenon to add all kinds of reagents (dye, acid, salt solution) forming a gradient; 4, To avoid contamination of the sample. Package Includes:100 Pcs Microscope Glass Case 22*22mmNote: the light and different displays may cause the color of the item in the picture to be slightly different from the real thing. The allowed measurement error is +/- 1-3cm.