Description The Optical Lens Physics Experimental Teaching Instrument is a tool designed for physics experiments. It features lens with a focal length, making it ideal for teaching purposes. The lens is made from durable materials, ensuring its longevity. Its versatile design allows for multiple application, including its use in telescopes. With its precise optical performance, this instrument guarantees accurate experimental results. Features -Color:Transparent -Material:Glass -Size:5.00X5.00X0.40cm/1.97X1.97X0.16in -Focal length: 30cm -This lens has a focal length, which allows for clear and focused images. -The design of this product makes it easy to handle and operate. -Stable material is used in the construction of this lens, ensuring durability and reliability. -This lens has a versatile application in telescopes and other optical devices. -The precise optical performance of this lens ensures accurate experimental results in physics education. Package list: 1 x Biconvex lens