Builder Series Mini Prisms, compatible with Sokkia or Topcon robotic poles

Builder Series Mini Prisms
These robotic prisms are built to a prism constant of -7mm.
Threading is 5/8x11 and can be used with Sokkia or Topcon
robotic poles. The prism can also be used seamlessly with
Sokkia SB179A quick release adapter system. Which comes
standard with RC-PR5A kits.
It's Powder painted Fluorescent Orange with Fluorescent Yellow targets.
The assembly features a 25mm copper-coated prism, for fog prevention,