This item is a microscope cover glass kit for optical microscope. Each one is made of optical glass to insure its clarity and transparency. All the slides and covers are well processed and will not cut your finger in most situation. Features - Color: Transparent. - Material: Glass. - Size: 3.00X3.00X2.00cm/1.18X1.18X0.79 inch. - No edges, it is safe in daily use. Mainly used in optical microscope to firm the observed objects. - They are so simple to use and give a great view. Good presents for inspiring children's curiosity to tiny things. - The microscope slides are great for students of all ages, from home-schoolers to college students. - Cover keeps specimens flat, holds them in place, and protects them and with the microscope lens. - It is manufactured with professional technology to ensure the of the product and can work for a long time. Package list: 1000 Pcs/10 Boxes x Coverslips