Description: 【Smooth Edges】: The ADS103 mini prism is designed with smooth and neat edges, meticulously polished to ensure a good finish. 【Material】: This product is made from sturdy aluminum alloy and PP, ensuring its longevity and robustness for long-term use. 【Product Dimensions】: The mini prism measures 7cmx3.5cm, making it compact yet effective for its purpose. It also comes with a 50cm poles for easy installation and usage. 【Versatile Use】: Ideal for tunnel monitors, this reflective prism can be used with full station instruments to enhance signal detection and accuracy. 【High Precision】: With its well-crafted design, this single prism accessory promises measurements and reliable performance in various conditions.   Specification: Material: Aluminum Alloy, PP Size Chart: Prism: 7cmx3.5cm/2.76inchx1.38inch Poles:  50cm/19.69inch Package Includes:1x Mini Prism Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful online shopping!