DIY 20Pcs Microscope Slides with Double Depression 76.5x25mm Glass Double Concave Slide Pre-Cleaned Rectangle Cover Slips for Lab Supplies DIY Double Microscope Slide: You will receive 20pcs double concave slides,the size of each slide is 25mm wide,76.5mm long,1mm thick,enough quantity to meet your daily needs. Safe Design:Microscope slides have no compatible with sharp edges, they are neat to help protect the skin from injury and children can use them safely. Paper Insterted: In order to easy to use,we place paper between each microscope slide to prevent scratching the slide. Good Material: The slides are made up of high quality optical glass，it adopts special glass treatment technology for high transparency. Wide Usage:Suitable for all optical microscopes to make biological microscope specimens, including plants, insects and animal tissues for biological education. Double Microscope Slide: You will receive 20pcs double concave slides,the size of each slide is 25mm wide,76.5mm long,1mm thick,enough quantity to meet your daily needs. Safe Design:Microscope slides have no compatible with sharp edges, they are neat to help protect the skin from injury and children can use them safely. Paper Insterted: In order to easy to use,we place paper between each microscope slide to prevent scratching the slide. Good Material: The slides are made up of high quality optical glass，it adopts special glass treatment technology for high transparency.