Features [High Precise] This corner cube prism with the diameter of 1 inch (25.4mm) provides precise measurement and efficient performance, ideal for various applications. [Optical Glass] Crafted with optical glass, this prism undergoes meticulous polishing to achieve a bright and glossy finish, enhancing the overall aesthetic appeal. [Protective Coating] The prism features a uniform and smoothly surface coating that not only adds a layer of protects to the glass, but also ensures long lasting durability. [Standard Size] Strictly manufactured, this corner cube prism has high standardization, with precise size and shape, can seamlessly fit various instruments. [Long Lasting] Designed to withstand wear and tear, this trihedral retroreflector is built to last, providing enduring performance even in demanding environments. Spec: Item Type: Corner Cube Prism Material: Optical Glass Aperture: 0.2-1 Irregular Aperture: 0.1-0.3 Clarity: 60 40 Total Angle: 2-8sec Diameter: Approx. 25.4mm/1in Package List: 1 x Corner Cube Prism Package List 1 x Corner Cube Prism