• Standard main jets for Gasoline carburetors
• 1/4-32 thread
• Available in a variety of sizes, sold in pairs
• Metering orifices control fuel flow into metering system
• Rated in flow capacity ”cubic centimeters per minute” & changeable for tuning purposes
• Shape of entry, exit & size determines flow
• Jets are flow tested & then stamped with the correct number
• Not for use with carburetors originally designed for alcohol