E3.12 is a 14mm, 0.375 in. reach plug with a gasket seat. It is used in a wide variety of small engine applications, especially handheld lawn & garden equipment. The patented DiamondFire side wire is proven to increase power, reduce fuel consumption and improve hydrocarbon emissions in long-term use. The unique ground electrode and full-size center electrode also provides optimal performance over an extended product life. Replaces - Champion: CJ4, CJ6,CJ6Y, CJ7Y, CJ8, RCJ4, RCJ6, RCJ6Y, RCJ7Y, RCJ8, 5843, NGK: BM6A, BM6Y, BM7A, BM7Y, BMR6A, BMR7A, BPM7A, BPM7Y, BPMR6A-10, BPMR7A.