COMPATIBILITY - TORCH spark plugs B8RTC-9 Replace for NGK CPR8EA-9/2306 Spark Plug, for Denso U24EPR9 U27EPR9 Spark Plug, for Honda CMX500 2017-2020 Spark Plug, for Honda CRF150F 2012-2017. SPECIFICATIONS - Thread Size:M10*1 MM, Thread Reach:19MM ,Hexagon Size:16MM. Please check for correct specifications and measurements for your application!!! Compatible Vehicles:Fit for Honda CB500F/ CB500X/CBR500R 471cc/CRF150F 149cc 2006-2017/NCW50 Metropolitan 2016-2020/NT700V /NT700VA ABS/NX500/SCL500 471cc Compatible Vehicles:Fit for Yamaha FJR1300A/FJR1300ES 1298cc 2013-2019;WR450F 450cc 2019;XC155 SMAX 155cc;YZ450F/YZ450FX 449cc 2018-2020 APPLICATIONS - Spark plugs are an important part of the ignition system of gasoline or gas engines, and are widely used in many fields such as automobiles, motorcycles, aircraft, garden tools, yachts and industrial engines. specifically designed to increase power, reduce fuel consumption and improve hydrocarbon emissions.