Feature:1. APPLICABLE MODEL: Compatible with most manufacturers, such as for Trimble, for Sokkia, for Topcon, for Pentax, for Nikon, etc.2. FORM FACTOR: This is a measuring prism with soft protective case, basic circular prism reflector and holder3. WITH CONNECTOR: Measuring prism come with adjustable brass connector, flexible, you can use with confidence4. THREAD AND MATERIAL: The bracket has 5 or 8x 11 thread, ABS and K9 material, high gloss, light transmission, no bubbles5. SIZE PARAMETERS: Measuring prism effective diameter for 64mm, measuring prism offset is 0 or 30mm, you can master and useSpecification:Item Type: Total Station PrismMaterial: ABS and K9Effective Diameter of Measuring Prism: Approx. 64mm or 2.52inMeasuring Prism Offset: 0 or -30mmBracket have 5 or 8x 11 threads.Package List:1 x Prism1 x Storage Bag