Champion Spark Plug RN14MC5 #31 Condition: New Dependable Performance - Features A Copper Core Electrode That Provides Increased Conductivity And Heat Control, Providing Good Overall Wear Characteristics. Product Features: Dependable and Durable. Built to ISO and SAE standards for proven performance. Patented SAC-9 semi-conductor resistor for maximum EMI RFI suppression. Provides Longer Life. Copper core center electrode allows for accurate control of heat range, optimizing the performance and longevity of the spark plug. TinTac and ULTRASEAL Shell. Eliminates the need for use of antiseize compound by providing the best corrosion protection of any spark plug in the industry. SPECIFICATIONS Center Electrode Diameter: 0.1 Electrode Core Material: Nickel Copper Alloy Electrode Tip Material: Nickel Copper Alloy Ground Electrode Core Material: Nickel Copper Alloy Ground Strap Quantity: 1 Installed Height: 2.24 Insulator Material: Zirconia Enhanced Insulator Projection: 0.12 Insulator Type: Zirconia Enhanced Manufacturer Heat Range: 14 Performance Rated: Reach: 0.75 in Resistor: Y Ribbed Core Nose: N Seat Type: Gasket Shorty Spark Plug: No Taper Diameter: 0.25 Tip Configuration: J Gap Type: RN14MC5 Wrench Diameter: 13/16 inch Purchase is for one spark plug. MPN: 31 UPC: 037551108565 · USA domestic shipments are shipped USPS First Class Mail with Tracking International shipments are shipped USPS First Class International Mail with Tracking