The combo of different sizes and types of fan propellers (15 pcs) is a versatile set of fan blades designed to meet a wide range of cooling, airflow, and hobby project needs. This assortment includes multiple sizes and pitch styles, allowing you to choose the right blade for your specific application, whether it’s for rc drones, model aircraft, small ventilation fans, robotics projects, or diy electronics experiments. Made from durable plastic or composite materials, the fan propellers are lightweight yet sturdy, providing reliable performance and smooth airflow when mounted on compatible motors. The variety pack gives you the flexibility to experiment with different blade diameters, shapes, and pitches to achieve the best balance between thrust, speed, and efficiency. Easy to install and compatible with a range of dc and brushless motors, these fan propellers are ideal for makers, hobbyists, students, and engineers working on projects that require customized airflow solutions. The combo pack saves time and cost compared to buying individual blades, making it a convenient choice for anyone looking to build, test, and optimize fan‑driven mechanisms or aerial platforms.