This lot of 4 Top Flite wooden propellers is a great find for any RC model enthusiast. The set includes one each of 11x6, 11x4, 11x7 3/4, and 10x4 sizes, making it compatible with a range of 1:4, 1:5, 1:6, and 1:8 scale models. Crafted in the United States, these propellers are designed to be compatible with both gasoline and nitro & glow fuel, and are suitable for use with age levels of 17 years and up. With its universal compatibility, this set is perfect for anyone looking to upgrade their RC model vehicle.