Item Description Type: Heavy Duty performance coils! Ignition coils with Copper windings. Comes with the manufacturer’s one year warranty! Materials Instruction 1. Epoxide-Resin Glue: Kyocera (Japan) Epoxide-Resin Glue is specially developed as a isolate potting materials made by Kyocera Group. Now became the worldwide appointed brand by more than 60% company which make ignition coils. .