New spark plug, original Insulator Specially of the size ZM 14-260. Original built-in in the model ETZ250 , ETZ251 , TS250 , ETZ300 , ETZ301. Also runs with good engines ETZ150 . Particularly with MZ there is no better spark plug at the market! Also of the rows ETS and ES from 250 ccm. Of course with all SIMSON.
