The O.S OS #6 A3 Glow Plugs are a set of three high-quality glow plugs designed for various RC model vehicles such as airplanes, helicopters, cars, trucks, motorcycles, boats, and watercraft. Compatible with nitro and glow fuel, these glow plugs are suitable for hobbyists aged 8 and up. Made in Japan by the reputable brand O.S., these glow plugs are durable and reliable for your RC fuel system needs. Upgrade your engine with these glow plugs for optimal performance and smooth operation.