Item Type: Mini Prism _x000D_ Mode: FDC064_x000D_ Material: K9 Glass, ABS_x000D_ Effective Diameter: Approx. 25.4mm / 1in_x000D_ Offset: Approx. 17.5mm / 0.69in_x000D_ Scope of Application: Testing of tunnels, subways, mines, highways, etc._x000D_ Application: Widely used in various industries such as subways, railways, tunnels, dams, steep slopes, etc. 1EXCELLENT PERFORMANCE: The use of polymer encapsulated glass components not only ensures accurate positioning, but also ensures high durability. 2HIGH ACCURACY: Land surveying equipment, reducing errors and ensuring millimeter accuracy, used for total station land surveying. 3K9 GLASS PRISM: The circular mini prism uses premium K9 glass component that is precisely ground to ensure complete accuracy of your measurements. 4WIDE APPLICATION: This mini prism is widely used in various industries such as subways, railways, tunnels, dams, steep slopes, etc. 5EASY CARRYING: Compact size and being light in weight as well make the prism easy to carry to different scenes to use. 1 x Mini Prism 1 x Cover 1 x Adapter 1 x Storage Bag