Feature: 1. MATERIAL AND STRUCTURE: The appearance of the prism is red, made of excellent material, and the service life is long. 2. OPTICAL GLASS ACCURATE DETECTION: Using excellent K9 glass material after cutting and carefully polished, more accurate and durable measurement. 3. FALL RESISTANT DESIGN: The overall material of the prism is made of excellent aluminum alloy. The lens wrapping makes the prism wear resistant and fall resistant, which greatly improves the service life of the prism. 4. CLEAR AND ACCURATE: Enhance the reflection ability of prism, possess full texture, clear and bright, improve the accuracy of measurement, measurement work become more simple. 5. SCOPE OF APPLICATION: Mini prism can be used for tunnel, mine, highway detection, etc., suitable for measuring instruments, widely used in railway, dam, steep slope and other industries. Specification: Item Type: Total Station Rotating Prism Model: FDC067 Material: k9 Glass, Aluminum Alloy Prism Offset: 0/-30 mm Rod Diameter: Approx. 12mm / 0.47in Rod Full Length, 4pcs: Approx. 1.2m / 3.94ft Application: For the testing of tunnels, subways, mines, highways, railways, dams, steep slopes, etc. . Package List: 1 x Total Station Rotating Prism4 x Rod Piece1 x Connector2 x Wrench1 x Measurement Foot2 x Storage Bag