Champion 938M Spark Plug Copper Marine Pack Of 4
- Thread Size: 14mm, Seat Type: Gasket, Resistor Type: Inductive, Reach: 12.7mm (1/2")..
- Hex Size: 13/16" (21mm), Terminal Type: Solid, Gap:.030" (0.75mm)..
- Material: Nickel, Type: Standard, Size: 2.5mm, Projection: Non-Projected..
- Conventional spark plug with nickel alloy electrodes. Copper core center electrode allows for increased conductivity and heat control..