E3D Revo™ HeaterCore (24V and 12V Core) (40w) The HeaterCore secures onto a Revo-compatible cold side using a Revo HeaterCore spring (included). After it’s attached, just screw in a and you’re ready for simple, tool-free nozzle swaps that don’t need hot tightening. Heats up much faster than a typical heaterblock. It’s designed to be much safer, too – a positive temperature coefficient (PTC) means power reduces as it gets hotter, reducing hazards in the event of a thermal runaway. Compatible with many popular 3D printers such as Creality CR series and Ender series, Prusa, Anet, Biqu, Monoprice, and many more. Learn everything you need to know about the Revo HeaterCore in E3D's. Unsure on the voltage you need? E3D has a nice page to help you identify the voltage from your power supply:

• The HeaterCore secures onto a Revo-compatible cold side using a Revo HeaterCore spring (included). After it’s attached, just screw in a and you’re ready for simple, tool-free nozzle swaps that don’t need hot tightening.
• Heats up much faster than a typical heaterblock. It’s designed to be much safer, too – a positive temperature coefficient (PTC) means power reduces as it gets hotter, reducing hazards in the event of a thermal runaway.
• Compatible with many popular 3D printers such as Creality CR series and Ender series, Prusa, Anet, Biqu, Monoprice, and many more.
• Learn everything you need to know about the Revo HeaterCore in E3D's.

Unsure on the voltage you need? E3D has a nice page to help you identify the voltage from your power supply:

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