This lot of 4 APC nylon GF propellers is perfect for any R/C model airplane enthusiast. The set includes one 11x11 propeller, one 14x6 propeller, and two 11x8 propellers, all in a sleek gray color. These propellers are compatible with both gasoline and nitro/glow fuel, and are suitable for models on a 1:4, 1:5, 1:6, or 1:8 scale. Made by APC Propellers, a trusted brand in the R/C industry, these propellers are sure to provide smooth and efficient performance. They are suitable for use by advanced hobbyists, aged 17 and up. Made in the United States, these propellers are a reliable choice for any R/C model airplane.