Champion Spark Plug #406 4-PAK RV12YC | 6 Hardware/Fasteners When you're not using the

When you're not using the iSHADE

Shaft: 1-1/8" Maximum Panel Thickness

Use in place of stainless steel thru-hulls

Tube: 7/8" with a wall thickness of 0

Champion Spark Plug #406 4-PAK RV12YC | 6 Hardware/Fasteners When you're not using theChampion Spark Plug #406 #24 RV12YC 4 PACK For all brands of marine engines. Champions traditional plugs are all constructed with a corrosion resistant zinc plated shell. Resistor plugs have the most durable high voltage semiconductor while marine application use a special wire wound Q type suppressor (CDI resistor) when noted. Copper core ground or center electrode (when noted). Conforms to all I. S. O and S. A. E standards as specified by all