Please note that if you are planning to use this on a printer to verify that you want 12v or 24v versions. For example the Prusa MK3 printer uses a 24v power supply and the MK2 uses a 12v power supply.
With these new heater cartridges, E3D has managed to improve on their already first-class 30-watt heaters and now including their 40-watt heaters as well. They have also added a connector, so that combined with their cartridge thermistor you can now change Hot Ends without having to modify all your cable routing. The cable included is also crimped with ferrules at the other end to make plugging in your new cartridge much easier and neater (see images). Get your HotEnd hot quickly and reliably hit the highest of temperatures with these high shiny new cartridges.
Every heater comes with one meter of silicone-insulated high-temperature cabling, and is available in 12V or 24V.