This DuBro 243 set includes plated brass Dura-Collars that are compatible with various DuBro products such as landing gear, callers, tires, and parts. The silver color and multiple scale compatibility make it a versatile addition to any airplane model. The set is suitable for use with gasoline, nitro & glow fuel, and electric power. It is designed for use by individuals aged 12 years and up, as well as those aged 17 years and up. The brand is DuBro, and the model number is Dubro 243. This set is perfect for those interested in RC model vehicles and aerospace toys.