The product is a lot of three 3-inch snap-on spinners in yellow, black, and blue colors, designed by Carl Goldberg. These airplane spinners are compatible with various brands such as Universal, Topflite, and Goldberg, and can be used with gasoline, electric, and nitro & glow fuel model vehicles. Made in the United States, these spinners are suitable for a 1:4 scale model airplane. Perfect for RC enthusiasts looking to enhance their flying experience with colorful and durable components from a trusted brand.