Model: 6014,Leica type 360 degree prism . Model: 6020-1*Leica style prism 360 degree prism *Small size (Height 50mm , Diameter 42mm) *Offset 23.1mm *Measuring distance 1000m*Accuracy 5"Packing : Export packing we main export them to Eurpoean and U.S.A. market . If you are interested in these products ,Pls. feel free advice us !Thank you for you cooperation !