Priced Individually. Single Spark Plug. 

Fits Early International Harvester McCormick-Deering Machines such as the:

F12, F14, F20, F30, O12, O14, T20, W12, W14, W30, W40, W9, WK40, WR9, WR9S, 10-50, 15-30, 22-36

Non-Resistor Plug , Will work with Low-Tension and High-Tension Magnetos. 

Safe for use with Copper Core Spark Plug Wires. 

Comes with Thumb-Nut as Shown for Vintage Style Rajah Clip-On Plug Wires Connectors

Spark Plug DOES NOT COME PRE-GAPPED. Will need to Gapped to specification before installation.