12V 40W Cartridge Heater — 5-Pack for 3D Printer Hotends

Overview:
This bundle contains five 12V, 40W cartridge heaters intended as drop-in heater replacements for desktop 3D printer hotends. Each cartridge is engineered to heat quickly and maintain stable temperatures for extrusion tasks.

Construction and dimensions:
The heating elements are made from 304 stainless steel. The metal cartridge body has a 6 mm outer diameter and a 20 mm active heater length. Each unit is fitted with a 1 m (approx. 58.9") high-temperature insulated lead for easy routing to your printer’s controller. Electrical specs include a resistance range of 3.4–3.8 Ω (nominal 3.6 Ω) and an expected wattage range of 37–42 W (nominal 40 W).

Installation and use:
These cartridges are intended for insertion into standard 6 mm heater bores in common hotend heater blocks. The pre-wired leads make connection straightforward — simply match the 12V system and secure the cartridge in the block. They are suitable for filament extrusion, offering rapid response and high sensitivity for temperature control.

Compatibility and package contents:
Compatible with a variety of printers that use 12V heater cartridges including many Creality Ender and CR-10 series models, Prusa i3-style hotends, Anet E10, and similar machines. Package includes: 5 x 12V 40W cartridge heaters with 1 m high-temperature leads. The design emphasizes easy replacement, decent stability and reliability under normal printing conditions.