These horizontal gpr antennas can be used for measurement in different areas to locate metals, voids, water or underwater. They are used in the Ground Scan mode to receive a 3d image of the underground. They are available in different sizes which will optimize the scanning method. The gpr antenna 25cm is specially interesting for searchers who have to scan areas with difficult access. This smallest antenna is used for detailed research, to detect small objects. The scanning process is longer because of the small sized antenna and so the small area it covers, but very suitable to search in uneven terrain. The gpr antenna 50cm is a compact antenna suitable for most measurement procedures. This antenna is included in the basic package of eXp 5000. The larger gpr antennas of 75 and 100 cm are used to scan large areas, to get a fast overview about the complete terrain.