1、Optical Glass Lens: The lens of this total station prism is made of optical glass, with fine cutting and polishing to ensure accurate measurement. 2、Good Durability: The lens adopts oxidized plastic coating to ensure good wear resistance and impact resistance, extending their service life. 3、L Shape Stand: The total station prism is equipped with L shape stand, standard 90 degree right angle to ensure stable and reliable measurement. 4、Prism Specification: The effective diameter of this prism is 25.4mm, with ‑25mm constant, and suitable for Leica and other measuring instruments. 5、Wide Application: Widely used for surveying tunnels, subways, mines, highways, railways, dams, steep slopes, etc., to meet various usage needs. Item Type: Total Station Prism Material: Optical Glass, Plastic Specification: Rainproof Constant: -25mm Effective Diameter: Approx. 25.4mm / 1in Application: Surveying tunnels, subways, mines, highways, etc., suitable for Leica and other measuring instruments Use: Widely used in various industries such as subways, railways, tunnels, dams, steep slopes, etc. 1 x Total Station Prism