The NGK BR7ES spark plug is a “medium heat” resistor type that is perfect for either the modern urban commuter or the open highway scooter Please refer to the Specs tab for more data.Description The NGK BR7ES spark plug is a “medium heat” resistor type that is perfect for either the modern urban commuter or the open highway scooter.Please refer to the Specs tab for more data. WARNING California Residents: Proposition 65 Warning Specifications Name: NGK BR7ESThread: 14 mmReach: 3/4″ (19 mm)Heat: 7 (medium)