Design: Our microscope slides are made of premium quality glass and feature a 45 degree frosted design non-slip ,makes them easy to grip and handle. Application: Suitable for all optical microscopes, such as biological education, student laboratories,and observing biological specimens with a microscope. Excellent Clarity: Our microscope slides are made of the highest quality optical glass and feature excellent clarity. Sealed Package: Our microscope slides come in a sealed package that helps to protect them from dust and other contaminants. The slides are also pre-cleaned and ready to use, making them easy to use and convenient for any lab. Package included: 50PCS Microscope Slides 25.4 x 76.2mm/1 x 3in