Extendable Geo Probes

Made of copper metal, prob length is 70 cm, diameter 12 mm and weighs about 650g, supported with a piece of plastic to facilitate the process of dragging after planting in ground.
in order to get abetter and more accurate results, you may ask your seller to upgrade the ground probs set as the following!
Extendable copper probs: (38/70)X2.