... . ONE-STOP SERVICE D. N.G.K. MODEL D7EA spark plug detailsCentral Electrodecopper, alloy, platinum, iridium goldCeramic white or colored, ... deposit, actually depend on your QTYPayment L/C, or T/TPacking BLISTER CARD, or box PERFORMANCE 1. INSULATOR AVOIDFLASHOVER2. ... REPLACED IT MANY TIMES BEFORE.3, MAKE SURE SPARK PLUG RIGHT INSTALLATION. SPARK PLUG HOUSING BREAKS IF TOO TIGHT WHILE MOTOCYCLE SHAKES ...