Prism constant:
-16.9mm(Non-Leica system)
+17.5mm(For Leica system)

Dimension:
Prism diameter: 1inch
Sphere diameter:1.5inch

Item contains:

Magnetic Spherical Steel Prism Holder*1
· 38.1mm/1.5inch Diameter
· 440C Stainless Steel Sphere
· Hardened Surface
· 0.002mm Roundness Error

High Precision Prism *1
· Copper Coated
· inch diameter
· 3arcsec beam deviation

Black Prism Ring*1
· Non-removable

Magnetic Base *1
· Comes with Centering Pin

Break Resist