Replacement Inserts (14mm Spark Plug)

Replacement insert set consists of eight inserts:

• 2 x 14mm x 1.25 inserts 17.5mm long black finish. (Thin head)
• 2 x 14mm x 1.25 inserts 17.5mm long golden finish. (Thick head)
• 2 x 14mm x 1.25 inserts 12mm long black finish. (Thin head)
• 2 x 14mm x 1.25 inserts 12mm long golden finish.(Thick head)
• Special 14mm x 1.25 re-threading tap for cleaning.
• Replacements for item ‘4100’