Heatblock & Sock , PT100 volcano heat block aluminum for E3D volcano hotend 3D printer heated block for titan extruder, Silicone sock V6, Volcano silicone heat block sock heater allows you to use our new thermistor cartridges, as well as a high temperature, high accuracy PT100 temperature sensors, Heating Blocks is the part of the extruder where the nozzle meets the thermal barrier tube. Heatblock & Socks , PT100 silicone sock cover thermal protection socks compatible with V6 PT100 heatedblock hotend and titan aero extruder. Hotend silicon sock will keep your nozzle clean and free of burnt on blackened plastic. If we use this, it will keep your nozzle clean and free of burnt on blackened plastic. They don’t just keep the nozzle clean, but also keep heat inside the hotend, and off the print.