Set of 100 pcs pre-cleaned blank slides for use in biological education. Dimensions of slides: 1 inch x 3 inch x .4 inch (25.4x76.2x1mm) Slides are composed of optical glass for clear viewing Precision ground and polished with smooth edges Pre-cleaned to ensure correct color and clear images of the specimens. Size:1 inch x 3 inch /25.4 x 76.2mm Thick:1mm-1.2mm Quantity: 100 pieces blank slides Material: glass colour: As shown Package Contents: 2 Set x Microscope Slides (50pcs ) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.