1、Excellent K9 Glass Material: This total station small prism is made of excellent and well polished K9 glass for more accurate measurements. 2、Excellent Aluminum Alloy Material: This total station small prism is made of excellent aluminum alloy material wrapped around the lens, which is anti abrasive and drop proof, making the prism anti abrasive and drop proof, and greatly improving the service life of the prism. 3、Accurate Measurement: This total station small prism is full of texture, clear and bright, which can improve the accuracy of measurement and make the measurement work easier. 4、Wide Application: This total station small prism is widely used in subway, railroad, tunnel, dam, steep slope and many other industries. It is suitable for Sokkia. 5、Compact Size: This total station small prism is compact in size, it doesn't take up much space when you use it, and it is easy to install.