70w High Temperature Heater Cartridge

Runice 24V 70W high-temperature heater cartridge, 6 × 20 mm, with a 1 m red high-temperature fiberglass-sleeved lead and tinned ends. Nobody else sells a Runice-branded 70W: this is the heavily insulated build Runice makes for dfh.fm, not the generic cartridge under another label.

Why this one

• Sleeve that stays put: the fiberglass insulation is embedded into the heating element, so it does not creep back off the cartridge after a few hundred hours the way the cheap ones do.
• 70W at 24V (2.9 A) — the headroom tier for big blocks, 300°C-plus materials and the fastest heat-ups.
• 1 m lead reaches the toolhead board or the frame on almost any build without an extension.

Specifications

• Voltage: 24V DC · Power: 70W (2.9 A)
• Cartridge: 6 × 20 mm stainless
• Lead: 1 m, red high-temperature fiberglass-sleeved lead
• Termination: tinned ends
• Maker: Runice (P/N 3028-07A), built for dfh.fm with a heavier insulation stack than the generic 70W cartridges

Fitment and pairing

• Any heater block with a 6 mm cartridge bore — V6, Volcano, Dragon and the many blocks cut to that standard.
• Pairs with the Runice 104NT thermistor cartridge — the 70W + 104NT cartridge kit is both together, a little under the two singles. For PT1000 builds, the 70W + PT1000 kit pairs it with our PT1000 sensor.

Gotchas

• 24V only. On 12V it makes a quarter of the power; on a 24V board configured for a smaller heater, re-run the PID tune and keep thermal-runaway protection on.
• 2.9 A needs a real connector: Micro-Fit 3.0, screw terminals or a toolhead board's heater terminals — not a JST-XH.
• Heater only — thermistor, block and connectors are separate (or take the kit above).