This is the specialised heater block for our Volcano upgrade pack.
Compatible with all Volcano Nozzles and all E3D HotEnds except Cyclops. This block uses the same clamped thermistor mounting configuration as the E3D-v6 Heater Block for maximum ease of use and security. The block also has a heater cartridge clamping system for maximum heat transfer, this time using two screws for clamping instead of the one in E3D-v6.
This block absolutely cannot be used with a non Volcano nozzle, plastic will go everywhere, please don't try.
Volcano documentation can be found here.