The Topcon Silver Prism 724801 offers enhanced precision for Sokkia & Topcon measurement instruments. This 62mm diameter prism is coated in silver, providing resistance to the wear and tear of regular usage and time. Its offset can be set to 0 and -40 millimeters. Additionally, it is water-sealed to protect the canister and its accuracy against moisture. It has an M20 stud and can be used with prism holders that have 5/8 inch – 11 female thread. This silver prism comes with a 1-year limited warranty.