Feature:1. Specifications: 360 degree hanging total station prism, with a constant of 29mm and a offset of+30mm, with an effective diameter of 25.4mm (1 inch), providing efficient and reliable surveying.2. Reliable Material: The total station prism is made of K9 glass and excellent aluminum material, has good erosion resistance, high strength, no deformation, suitable for various surveying environments.3. Secure Structure: The plastic shell surrounds the top and bottom of the prism to secure the glass and prevent the prism pole from flipping over at the top. The sturdy structure extends the service life.4. Applicable Range: This 360 degree prism is suitable for total stations and other surveying instruments, and is suitable for industries such as subways, railways, tunnels, dams, steep slopes, etc.5. Prism Installation Kit: Equipped with a total station prism, 4 surveying poles, adapter, and spring hook, this hanging prism kit is easy to install and use, making it an ideal choice for various robot work.Specification:Item Type: Total Station PrismMaterial: K9 Glass, AluminumPrism Offset: +30mmConstant: -29mmEffective Diameter: Approx. 25.4mm / 1inApplication: For Total Station SurveyingUse: For subway, railway, tunnel, dam, steep slope and other industries..Package List:1 x Total Station Prism4 x Surveying Poles1 x Adapter1 x Spring Hook1 x Storage Bag