Item Type: Corner Cube Prism Material: K9 Glass Aperture: 0.2-1 Irregular Aperture: 0.2-0.5 Finish: 60 40 Comprehensive Angle: 3-8sec 1[Precise Polished K9 Glass] This corner cube prism is carefully polished, ensuring a bright finish that provides exceptional measurement accuracy and work efficiency. 2[Coated Surface] The prism lens features a uniform and delicate coating on its surface, offering protection, ensuring long lasting durability. 3[Standard Size] Designed with a standard size and shape, this corner cube prism is compatible with various equipment and instruments, ensuring easy integration into existing systems. 4[Versatile Application] Suitable for a wide range of applications, including total stations, surveying, alignment, and optical measurement. 5[Enhanced Performance] With its K9 glass construction and precisely engineered design, this corner cone prism delivers exceptional performance, enhancing the accuracy and efficiency.1 x CornerCubePrism