Features 500m Measurable: Measure distances from 5 to 500m with high accuracy of 0.5 yards, suitable for various applications including golf courses. Slope Function: Calculate slope to provide accurate yardage for precise club selection during golfing. Ideal Golf Tool: Quickly lock onto targets for efficient and accurate shot measurements, making it an essential golfing companion. SMOOTH AND CONVENIENT: Features a streamlined tipping bucket design for self-cleaning and easy maintenance, providing accurate rainfall readings. INTEGRATED STRUCTURE: Consists of a one-piece shell, filter, funnel, and various essential components for reliable and convenient usage. Item Type: 45 Degree Prism Material: Optical glass and ABS Constant: +2mm Effective Diameter: Approx. 25.4mm / 1in Use: Total station engineering tunnel measurement 1 x 45 Degree Prism Package List 1 x 45 Degree Prism