Bujie standard NGK BR4-LM.
Technical specifications:
- thread diameter: 14mm
- thread pitch: 1.25mm
- with resistor: yes
- resistor value: 10K Ohm
- thread length (including unthreaded part): 9.5mm
- hex diameter: 21mm
- terminal type: detachable nut
- electrode gap: 0.7mm
- heat range: 4
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