Champion Spark Plug L20V #837 Marine Automotive Condition: New Dependable Performance - Features A Copper Core Electrode That Provides Increased Conductivity And Heat Control, Providing Good Overall Wear Characteristics. Product Features: Resists fouling and provides superior corrosion resistance. Dependable Performance. Built by the world leader in Small Engine spark plugs to deliver proven performance. 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 Insulator Material: Zirconia Enhanced Insulator Type: Zirconia Enhanced Manufacturer Heat Range: 20 Performance Rated: N Reach: 0.5 in Resistor: N Ribbed Core Nose: N Seat Type: Gasket Preset Gap (In): 0.048 To 0.053 Inch Preset Gap (mm): 1.22mm To 1.35mm Thread: 14 mm Shorty Spark Plug: No Type: L20V Wrench Diameter: 13/16 inch Purchase is for one spark plug. MPN: 837 UPC: 037551001705 · USA domestic shipments are shipped USPS First Class Mail with Tracking International shipments are shipped USPS First Class International Mail with Tracking