4 m depth earthen made of stainless steel 4VA diameter: 20 mm (solid material) with impact tip and cross connector for flat steel up to 40 mm. Set consists of 1 x 1 m pole with tip and 3 x 1 m follow rods and an SDS Max impact head. No cross-sectional thickening at the coupling connection point. Each set comes with a cross connector for the grounding tape. If necessary, you can reorder any number of extensions in the shop or buy different lengths. EH price = €44.40/m