Features: Survey Prism Structure: The survey prism pairs with an L shaped bracket, side knob and base mounting hole to give crews a compact reflector for construction layout and field measurement work. Field Visibility Support: The visible 60 mm prism face and bracketed support help crews locate and place the reflector during total station work with less setup guesswork. Shared Engineering Use Coverage: Built for surveying, construction layout and field measurement tasks, this prism keeps a clear product definition across recurring jobsite routines. Compact Size With Visible Reference: The sizing reference shows a 60 mm prism, 90 mm overall height and 76 mm base length, helping buyers gauge fit before adding the prism to field gear. Single Piece Ready For Field Prep: Each package includes a survey prism unit, making it easy to stage a spare reflector or dedicate this accessory to daily checkpoints and organized site setup. Specifications: Size: Approx.9.00x7.60x6.00cm/3.54x2.99x2.36inch; Thickness: Approx.1.60cm/0.63inch; Mounting Hole: Approx.1.00cm/0.39inch; Base Thickness: Approx.1.20cm/0.47inch Quantity: 1 Piece Package Includes: 1 piece Survey Prism note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind before you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color of the item.