Attributes

Brand	-
Category	Root / Office Equipment, Supplies & Services
Origin	-
Material	High-Purity Copper
Compatibility	CR-10, Ender 3, Ender 5, MK8 Extruder
Nozzle Thread	M6 Standard
Heater Cartridge Size	12V / 24V 40W Compatible
Thermistor Hole	5mm Diameter
Surface Finish	Polished Copper
Manufacturing Process	CNC Machined
Package Contents	1x Heater Block, 2x Screws
Weight	18 grams
Brand	Mellow

6 reviews

Anonymous

Mar 22, 2026

Rating: 4/5

Great product, minor installation note

The block itself is fantastic quality. Just make sure you have high-temperature paste when installing, as copper transfers heat very efficiently. Once set up, it works flawlessly with my CR-10.

Anonymous

Mar 21, 2026

Rating: 5/5

Perfect fit for my Ender 3 upgrade

This copper heater block fits perfectly on my modified Ender 3. The thermal conductivity is noticeably better than the stock aluminum block, leading to more stable temperatures during long prints.

Anonymous

Mar 16, 2026

Rating: 4/5

Solid upgrade component

Good weight and feel to it. Installation was straightforward on my Ender 5. It runs a bit hotter to the touch than aluminum due to the material, so be careful when adjusting.

Anonymous

Mar 13, 2026

Rating: 5/5

Excellent quality CNC work

You can tell this is machined with precision. The threads are clean, and the holes align perfectly with my thermistor and heater cartridge. Highly recommended for anyone upgrading their hotend.

Anonymous

Mar 10, 2026

Rating: 5/5

Superior thermal performance

Copper is definitely the way to go for high-flow setups. This block handles my increased filament throughput without any drop in melt consistency. Worth every penny.

Anonymous

Mar 05, 2026

Rating: 5/5

Solved my temperature fluctuation issues

I was experiencing weird temperature spikes with my old block. Swapping to this Mellow copper block stabilized everything immediately. My ABS prints look much smoother now.

5 FAQ

Q: Does this come with a nozzle included?

A: No, this package includes only the copper heater block and mounting screws. Nozzles are sold separately to allow you to choose your preferred brand and size.

Q: What is the maximum temperature this block can withstand?

A: The copper material itself can withstand temperatures well beyond typical 3D printing requirements (up to 1085°C melting point). However, always adhere to the temperature limits of your specific heater cartridge and thermistor.

Q: Is this compatible with a 24V heater cartridge?

A: Yes, this heater block is designed to accommodate standard 40W heater cartridges used in both 12V and 24V systems, provided the cartridge dimensions match the MK8 specification.

Q: Do I need to change my PID tuning after installing this?

A: It is highly recommended to run a PID autotune after installing a copper heater block, as the thermal properties differ significantly from aluminum, which ensures optimal temperature stability.

Q: Will this fit a stock Ender 3 V2 hotend assembly?

A: Yes, it is fully compatible with the stock hotend assembly of the Ender 3 V2, as it uses the standard MK8 geometry.

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