Description This item is a microscope slide kit for optical microscope. Each one is made of optical glass to insure its clearity and transparency. All the slides and covers are well processed with round will not cut your finger in most situation. Also good toys for children to play with. Feature - Color: As shown. - Material: Optical Glass - Slide Size: 76.2x25.4mm/3x1inch. - Cover Size: 18x18mm/0.7x0.7inch - Package includes 50 pieces of slides and 100 pieces of covers. - No edges, safe in daily use. - Mainly used in opitcal microscope to firm the observed objects. - They are so simple to use and give a great view. - Good presents for children to their curiosity to tiny things.Package list: 50 x Blank Silde 100 x Square Cover Glass