For the party, the calibration is 1.3 mm, 0.40 mmm is very little s almost serrated, and only spark plugs of an electrode of two of three of three of the performance is not true, they are known with the name of high -unrepenting spark plugs, in reality they are not very practical is more Powerful, now remember that the seacual spark plugs are just throwing a spark those of two untas 3 or 4 equal only one spark only that they have more roads where to跳,运气和问候。