The SAITO spark plug SP-1 is an essential accessory for RC airplane enthusiasts using older Saito ignition systems. This spark plug is specifically designed for gasoline engines of the FG-14, FG-14B, and FG-20 series, providing reliable performance for the operation of these models. Equipped with a large ignition shoe, the SP-1 ensures optimal ignition and contributes to the engine's efficiency. Made in Japan, this spark plug stands for quality and durability. It is sold individually, making it ideal for replacing defective or worn-out spark plugs. The SP-1 is an indispensable spare part for anyone looking to keep their older Saito engines in excellent condition. This spark plug is not only functional but also a crucial component for optimizing the performance of your RC airplanes.