Consists of 10mm thick wires pre-crimped spark plug wires. Great fat spark plug wire replacement for your 2017-2023 Road Glide / Street Glide. Built to meet or exceed OEM specifications. Great replacement for old worn out spark plug wires. Ton's Performance wires are built with a spiral wound alloy conductor with a high dielectric insulator, and 2 layers of silicone with final thickness of 10mm to protect against heat and tears. Ton's is one of very few companies that offers custom wires for many different applications in the aftermarket motorsports world. If you need a set of ready to install or universal wires for a custom built project, send us a message for more details. Placement of wires: - Front Lower Left Tower 3 - 34" 90 coil with 135 plug - Rear Lower Left Tower 4 - 18" 90 coil with 135 plug - Front Center Cyl. Tower 2 - 30.5" 90 coil with 180 plug - Rear Center Cyl. Tower 1 - 17.25" 90 coil with 180 plug