The E3D 80W Cartridge heater have been specifically designed for the SuperVolcano Hotend. They provide a massive 80W of power over a length of 47.50mm to achieve the highest flow rate possible in the SuperVolcano Hotend.
Please note the 12V Version is supplied with a MOSFET by standard and must be used with most controller boards. Do not use these cartridges on any other hotend than the E3D SuperVolcano. Be careful not to bend/fatigue the wires as they are fragile.