Thorlabs GNL20/M dual-axis goniometer stage in excellent condition. Comprises GNL18/M and GNL10/M goniometers with a mounting base. Metric version with imperial micrometers.

Micrometer driven, +/- 5 degree range for the bottom axis, +/-10 degrees for the top, 1" (25.4 mm) rotation axis height.

For additional information and resources, refer to the manufacturer's website.