Feature 1Land Surveying: This is a high precise land surveying equipment, which reduces errors and ensures millimeter accuracy, has a effective diameter of 64mm. 2Total Station Use: This surveying prism is used for total station land surveying, and is suitable for measuring instruments such as for Trimble. 3High Accuracy: The circular mini prism uses a high end glass component that is accurately ground to ensure that your measurements are completely accurate. 4Lasting Durability: The use of polymer encapsulated high end glass components not only ensures accurate positioning, but also ensures high durability. 5Wide Application: This single prism can be widely used in various industries such as subways, railway, tunnel, dam, steep slope, etc.SpecificationItem Type: Surveying PrismMaterial: K9 Glass, ABSEffective Diameter: Approx. 64mm/2.5inConstant: 0mm/-30mmApplication: Detection of tunnels, subways, mines, highways, etc. Suitable for measuring instruments such as for TrimbleUse: Widely used in various industries such as subways, railway, tunnel, dam, steep slope, etc. .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x Surveying Prism1 x Lid1 x Storage Bag