The Carl Goldberg hardened spring steel R/C landing gear axle shaft is designed for airplane models in 1:4 scale. It is compatible with Great Planes, Top Flight, and Hanger 9 brands, and can be used with various fuel types including gasoline, electric, nitro & glow fuel, and jet fuel/kerosene. The silver color adds a sleek and durable touch to your RC model vehicle, ensuring smooth and reliable performance during takeoff and landing. Perfect for enthusiasts looking for high-quality, heavy-duty landing gear components for their hobby aircraft.