Description This item is well made of premium material for durable and practical use. With 5cm in diameter and 100mm focal length, this glass lens will ensure its practicability through high performance. It is a pefect accessory for scientific experiments. Features - Color: As shown. - Material: Glass. - Size: 5 x 5 x 0.25 cm. - Dia. : 5cm. - Focal Length: 100mm - Made of polished glass with ground edges. - Double-convex lens for demonstrating optical principles and effects for students. - Used in scientific experiments and classroom demonstrations. - Perfect for use. - Lightweight, easy to carry and use. - Dear buyer, due to lighting effect, monitor's brightness, manual measurement, etc., there could be some slight differences in the color and size between the photo and the actual item. Sincerely hope that you can understand! Thank you!Package list: 3 x Lens Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin