Fits 1200-1600 aircooled engines 7mm copper core silicone cables Carbon core coil lead for reduced interference This HT lead set is designed for 1200-1600 aircooled engines, offering reliable performance with 7mm copper core silicone cables. The black cables come with AM resistive spark plug boots, ensuring a solid connection. For improved radio interference reduction, the coil lead features a carbon core. These leads are built to withstand high temperatures and provide consistent spark delivery for smooth engine operation. .