Feature:1. FINE WORKMANSHIP: Our optical glass lenses are carefully polished, and a uniform and delicate coating on the surface can ensure the quality of the lenses.2. PROTECTIVE SHELL: The prism is equipped with a soft protective shell to ensure that the triple prism portion is not subject to wear and prolong its life.3. SCOPE OF APPLICATION: Detection of tunnels, subways, mines, highways, etc. Suitable for measuring instruments such as for Trimble.4. WIDE APPLICATION: This prism is widely used in various industries such as railway, tunnel, dam, steep slope, etc.5. IDEAL REPLACEMENT: Wonderful replacement for the old and damaged parts, fine workmanship, attention to details, helps you improve the accuracy of the measurement!Specification:Item Type: Triple Prism Material: K9 Glass, ABSConstant: +2mmEffective Diameter: Approx. 25.4mm / 1inScope of Application: Detection of tunnels, subways, mines, highways, etc. Suitable for measuring instruments such as for TrimbleApplication: Widely used in various industries such as railway, tunnel, dam, steep slope, etc..Package List:1 x Triple Prism3 x Cover 1 x Storage Bag