6x20mm Cartridge Works with E3D, Dragonfly, Dragon, Mosquito, and many other hotends

50W @ 24V - Extremely Fast Heatup

1m Length Fiberglass Wire - With extra protection 

I use these on most of my farm - They work great!

Caution - Use a copper block or other alloy that can withstand 450C plus in case of controller MOSFET failure - Standard aluminum blocks can melt if there is thermal runaway