The SECO Eclipse Prism 6400-00 features a nitrogen sealed housing which makes certain that humidity will not be trapped inside and cause innacurate results. The 2 1/2 inch durable plastic housing protects the single prism from dust, molding and water. The prism has a -40 millimeter offset and includes a -30 millimeter offset adapter.
It also has a peep sight collimator for superior pointing precision. The target is reversible, with black-yellow on one side and white-yellow on the other.
This survey prism includes a 1 year warranty.