Feature: 1. EXQUISITE POLISHING: The optical glass lens is carefully polished, and the uniform and fine coating on the surface can ensure the quality of the lens 2. SIZE INFORMATION: This prism has a Diameter of 17.8mm glass lens, possess bright texture, providing measurement accuracy and efficiency 3. ACCURATE PROCESSING: Corner prism lenses are transparent, after strict manufacturing, standardized error is small, with high pass rate 4. DURABLE COPPER COATED: The copper coating of corner cube prism enhance durability and stylish design 5. WIDE APPLICATIONS: Plated corner prism is compatible with various optical instruments, making it versatile for surveying professionals Specification: Item Type: Corner Prism Material: Optical glass Aperture: 0.2~1 Irregular Aperture: 0.1~0.3 Finish: 6040 Integrated Angle: 2s~8s Diameter: Approx. 17.8mm 0.7in. Package List: 1 x Corner PrismEXQUISITE POLISHING: The optical glass lens is carefully polished, and the uniform and fine coating on the surface can ensure the quality of the lens SIZE INFORMATION: This prism has a Diameter of 17.8mm glass lens, possess bright texture, providing measurement accuracy and efficiency ACCURATE PROCESSING: Corner prism lenses are transparent, after strict manufacturing, standardized error is small, with high pass rate DURABLE COPPER COATED: The copper coating of corner cube prism enhance durability and stylish design WIDE APPLICATIONS: Plated corner prism is compatible with various optical instruments, making it versatile for surveying professionals