Features FINE POLISHING: The optical glass lens is carefully polished, and the uniform and fine coating on the surface can ensure the quality of the lens ACCURATE PROCESSING: Corner prism lenses are transparent, after strict manufacturing, standardized error is small, with high pass rate SIZE INFORMATION: This prism has a diameter of 25.4mm glass lens, possess bright texture, providing measurement accuracy and efficiency DURABLE COPPER COATING: The copper coating of corner cube prism enhance durability and stylish design WIDE RANGE OF 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: 60/40 Integrated Angle: 2s~8s Diameter: Approx. 25.4mm / 1in Package List:1 x Corner Prism Package List 1 x Corner Prism