Cap for most of the spark plugs Cap for most of the spark plugs
For K11 engines, K11B, 100cc K12 For K11 engines, K11B, 100cc K12
For 14mm piston pin like X30, Rok... For 14mm piston pin like X30, Rok...
Same thermal gradiation as NGK B10EG Same thermal gradiation as NGK B10EG
Same thermal gradiation as NGK B9EG Same thermal gradiation as NGK B9EG