The GTZ4 target plate for the GPH1 holder is designed to be used with the GPH1 holder to facilitate the aiming and identification of prism targets. The target plate provides a visible target that makes it easier to locate the measurement point and handle the prism assembly in the field. It is suitable for land surveying, construction surveying, and other geodetic tasks where quick identification of the measurement target is important. The product complements the existing GPH1 holder and helps build a prism assembly suitable for the intended purpose. Before ordering, it is advisable to verify the compatibility of the holder and other mounting components. The GTZ4 is easy to include in your daily surveying equipment and can also be used as a spare part. A properly chosen target plate makes prism target handling clearer and supports smooth workflows in various measurement environments. Before use, it is recommended to check the instructions for the surveying instrument being used and the suitability of the assembly for the planned measurement method. As a product model for the GPR121 circular prism with holder and target plate, this version is distinguished from other similar alternatives.