The Telrad Riser is an optional accessory for the Telrad sight which may be installed quickly and with no tools by the user. The upper platform of the Riser resembles the Telrad Base and accepts the Telrad Sight, while the bottom of the Riser matches the arrangement on the bottom of the Telrad Sight and thus fits perfectly into a Base. These Risers can even be stacked if desired to attain greater elevation.
For Stage Lighting applications you may simply elevate the Telrad sight so that it is more convenient to view through, away from the heat of the spotlight.
Note: photo shows 4" riser on the left and 2" on the right.