A device for delivering material into a target and/or extracting material form a target, the device comprising - a frame (101, 201, 301, 601, 701) comprising a space (102, 302, 402) adapted to contain conductive fluid comprising the material, - a first electrode (103A, 203A, 303A, 403A, 503A, 603A, 703A, 803A) and a second electrode (103B, 203B, 303B, 403B, 503B, 603B, 703B, 803B) positioned in the space, the first electrode substantially aligned with the second electrode so that tip of the first electrode (103a, 203a, 303a, 503a, 803a) is facing tip of the second electrode (103b, 203b, 303b, 503b, 803b), - a volume V (104, 204, 404) between tip of the first electrode and tip the second electrode, - a floating current source (105, 205) adapted to induce an electric current through the first electrode, the conductive fluid in the volume, and the second electrode, - an opening (106, 206, 406) adapted to allow the material to move from the volume to the target and/or from the target to the volume, - a magnet (107, 307, 407, 507, 607, 707) adapted to produce a magnetic field to the volume, the magnetic field being substantially perpendicular to the electric current, wherein the volume is ≤ 2000 mm 3, wherein mean distance of the tip of the first electrode and the tip of the second electrode is ≤ 20 mm, and wherein body of the first electrode (109A, 209A, 309A, 509A, 809A) and body of the second electrode (109B, 209B, 309B, 509B, 809B) are coated with insulating material, and the tip of the first electrode and the tip of the second electrode are coated with electrically conducting, non-ferromagnetic material so that only the tip of the first electrode and the tip of the second electrode conduct electricity. - a frame (101, 201, 301, 601, 701) comprising a space (102, 302, 402) adapted to contain conductive fluid comprising the material, - a first electrode (103A, 203A, 303A, 403A, 503A, 603A, 703A, 803A) and a second electrode (103B, 203B, 303B, 403B, 503B, 603B, 703B, 803B) positioned in the space, the first electrode substantially aligned with the second electrode so that tip of the first electrode (103a, 203a, 303a, 503a, 803a) is facing tip of the second electrode (103b, 203b, 303b, 503b, 803b), - a volume V (104, 204, 404) between tip of the first electrode and tip the second electrode, - a floating current source (105, 205) adapted to induce an electric current through the first electrode, the conductive fluid in the volume, and the second electrode, - an opening (106, 206, 406) adapted to allow the material to move from the volume to the target and/or from the target to the volume, - a magnet (107, 307, 407, 507, 607, 707) adapted to produce a magnetic field to the volume, the magnetic field being substantially perpendicular to the electric current, wherein the volume is ≤ 2000 mm 3, wherein mean distance of the tip of the first electrode and the tip of the second electrode is ≤ 20 mm, and wherein body of the first electrode (109A, 209A, 309A, 509A, 809A) and body of the second electrode (109B, 209B, 309B, 509B, 809B) are coated with insulating material, and the tip of the first electrode and the tip of the second electrode are coated with electrically conducting, non-ferromagnetic material so that only the tip of the first electrode and the tip of the second electrode conduct electricity.