Product Description 16pc M14 Spark Plug Thread Repair Kit PT41100 Repairs damaged spark plug threads internal & External thread sleeve design Installation tools, taps & thread sleeves M16 x 1.25 pitch tap 5 x black sleeves – M14 x 1.25 pitch x 17.5mm 5 x light colour sleeves – M14 x 1.25 pitch x 17.5mm 5 x black sleeve – M14 x 1.25 pitch x 11.2mm