1.ignition stable 2.super conductive 3.super sealing. 4.oxidation resistance 5.corrosion resistance 1.We supply various models of spark plug,can replace the model of NGK,DENSO,CHAMPION,BOSCH.2.Quality grade:can according to your need.3.Competitive price.4.Delivery goods on time.The same quality, let you enjoy the more affordable price!The same price, let you enjoy the more affordable service! ...