ILKAR7B11 is used double iridium type 
This item used for corolla act. many Japan cars 
The central electrode is produced by double  iridium 


Iridium is a kind of precious metal  and this precious metal has the following characteristics:
1, corrosion resistance
2, high temperature resistance
3, stable performance
The double iridium is designed to make ignition more focused and work longer

Qinglong spark plug Co., LTD. Is a professional manufacturer of spark plugs. The company will participate in domestic and international exhibitions every year, and its products are sold all over the world