This unique prism provides two back-to-back reflectors, both having 0-constants.
The one reflector is a cat-eye type providing a similar distance range as a mini-prism with both infrared and reflectorless EDM. The other is a reflective tape with target lines for short-range measurement.
For flexible mounting at various heights, the prism has two ¼” threads. When used on a standard Leica prism pole, the GAD105 adapter (No. 743503) is required.