Spark Plug Thread Repair Kit, 14mm Cylinder Head Rethreaded Kit Repair Tools Gasoline Engine M14x1.25 Inserts and M16x1.25 Tap Kit. INSERTS AND TAP: Including 10pcs M14 x 1.25 thread inserts and a M16 x 1.25 thread tap, is professional spark plug thread repair tool kit.
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