Features ALUMINUM ALLOY MADE: Made from aluminum alloy, this prism is lightweight and sturdy, ensuring long lasting durability. HIGH ACCURACY: Our road prism could ensure accurate measurement, providing consistent and reliable measurement results. MINI PRISM: Featuring a 25.4mm diameter and 8.92mm offset, this mini prism is easy and convenient to use, ensuring reliable data collection. COMPACT AND PORTABLE: With its compact design, this road prism is conveniently portable, making it suitable for various applications. LONG RANGE: The measuring distance of this prism is up to 600m, and the measuring range can achieve 800m if the weather is good. Specification: Item Type: Road Monitoring Prism Material: Aluminum alloy Measurement Range: 800m Measurement Distance: 600m Diameter: Approx. 25.4mm/1in Offset: Approx. 8.92mm/0.35in Package List: 1 x Road Monitoring Prism Package List 1 x Road Monitoring Prism