Precision-engineered aluminum target plate designed specifically for the Leica GPH1 prism assembly. Compatible with Leica 362830 GPR1 Prism and Leica 362820 GPH1 Holder, this GZT4 target plate ensures optimal surveying accuracy. Features Leica's signature snap-on functionality for seamless integration with Leica prism poles like the GLS11. Note that prism and yoke components are sold separately.