NGK CR7HSA
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- C- Meaning it has a 10mm thread size and a 5/8" hex size
- R- Resistor Type
- 7- Position on heat range from 2-12 (2 hottest, 12 coldest)
- H- 12.7mm (1/2") thread reach.
- S- Standard 2.5 mm Center Electrode
- A- Special Design