Universal Red Engine Spark Plug Gap Tool Gapper for 10mm 12mm 14mm 16mm 1pc pj
(Red Engine Spark Plug Gap Tool Gapping Gapper 10mm 12mm 14mm 16mm. Compatible With: Fit for most 10mm 12mm 14mm 16mm spark plugs. Item included: 1 x Spark Plug Gap Tool. 3) Used your desired size feeler gauge for gap thickness.