Feature:1. [Prism Specification] Our 360 degree prism features prism offset of +30mm, constant of 29mm, with an effective diameter of 25.4mm. Delivers the accuracy your surveying tasks demand.2. [Versatile Compatibility] This universal total station prism is perfectly suited for usage with surveying instruments like for Sokkia, for Trimble, etc.3. [Robust Construction] The surveying prism kit is made from k9 glass and aluminum, with a protective plastic shell atop and bottom to guard the glass, ensuring it withstands harsh job site environments.4. [Wide Applications] Ideal for a variety of industries such as subways, railways, tunnels, dams, steep slopes, etc. Our 360 degree mini prism optimally addresses all your surveying needs.5. [Practical Kit] This mini prism kit is the perfect choice for tasks requiring a measuring rod. Designed to offer reliable results and increased productivity in all machine works.Specification:Item Type: 360 Degree PrismMaterial: K9 Glass, AluminumPrism Offset: +30mmConstant: -29mmEffective Diameter: Approx. 25.4mm / 1inApplication: for Sokkia, for Trimble, etc.Use: Widely Used in Subways, Railway, Tunnel, Dam, Steep Slope, etc..Package List:1 x 360 Degree Prism4 x Survey Rod1 x Adapter1 x Spring Hook1 x Storage Bag