Item Type: Total Station Prism_x000D_ Material: ABS and K9_x000D_ Effective Diameter of Measuring Prism: Approx. 64mm / 2.52in_x000D_ Measuring Prism Offset: 0/-30mm_x000D_ Bracket have 5/8x 11 threads 1APPLICABLE MODEL: Compatible with most manufacturers, such as for Trimble, for Sokkia, for Topcon, for Pentax, for Nikon, etc. 2FORM FACTOR: This is a measuring prism with soft protective case, basic circular prism reflector and holder 3WITH CONNECTOR: Measuring prism come with adjustable brass connector, flexible, you can use with confidence 4THREAD AND MATERIAL: The bracket has 5/8x 11 thread, ABS and K9 material, high gloss, light transmission, no bubbles 5SIZE PARAMETERS: Measuring prism effective diameter for 64mm, measuring prism offset is 0/?30mm, you can master and use 1 x Prism 1 x Storage Bag