ITEM NO.: IC-9320 OEM NO: BUICK 12578224 099700-0850 5Z01A We use :Copper wire : Germany 180°C Elektrisola copper wire Epoxy resin :USA Huntsman Plastic sheel and High voltage coil skeleton : GEIgnition module: top quality Products Test:Parameter: same as OETemperate Test: under the 125 ° C 1 hour and -40 ° C 1 hour, total 100 cyclesHigh Voltage Open electric circle test :4 hours Produce management:TS16949 We are pleasure share with you our best products. Passed OE standard parameter test