The Leica GPR1 Single Circular Prism is a precision round prism that easily snaps on to prism poles. It features a centering accuracy of 2.0 millimeters with zero millimeter offset. The GPR1 is manufactured from high-quality optical glass for increased range and accuracy.

This Leica round prism’s surface is coated with anti-reflection copper which also improves reflectivity and prevents adverse dirt or condensation. It is compatible with Leica GLS111 reflector poles and perfectly fits the Leica GPH1 and GPH3 round prism holders.