Features OPTICAL GLASS LENS: The optical glass lens of the prism undergoes meticulous polishing, ensuring a smoothly and uniform surface. The lens is coated with a fine and even coating, guaranteeing superb performance. EXCELLENT TRANSPARENCY AND FLAWLESSNESS: The prism lens has outstanding transparency, with a flawlessness surface that allows for clear and accurate measurement. It is manufactured with stringent standards, resulting in minimal standardized errors and a ACCURATE MEASUREMENT: With a glass lens diameter of 17.8mm, this prism offers exceptional measurement accuracy. Its bright and clear texture enhances the accuracy and efficiency of measurements, making it a reliable tool for various applications. CONVENIENT DESIGN: The corner cube prism is designed to be user friendly, with a compact and lightweight form factor that is easy to handle and transport. Its smoothly design ensures optimal ease of use without sacrificing performance. VERSATILE APPLICATIONS: The corner cube prism finds versatile applications in various fields such as surveying, mapping, optical experiments, and scientific research. Its premium glass lens and accurate measurement capabilities make it an necessary tool Specification: Item Type: Corner Cube Prism Material: Optical Glass Aperture: 0.2 to 1 Irregular Aperture: 0.1 to 0.3 Finish: 60/40 Integrated Angle: 2s to 8s Diameter: Approx. 17.8mm / 0.7in Package List:1 x Corner Cube Prism Package List 1 x Corner Cube Prism