Features:

l Hollowed spinner cone and aluminum backplate with beveled fan leaves, providing extra backward airflow into the cowl

l Excellent cooling effect for brushless motor, especially beneficial for extreme 3D flying

l Backplate made of high quality aluminum by precise computer numerically control (CNC)

l Light weight, ideal for electric 3D aerobatic and F3A pattern planes

l 5 colors: White, Yellow, Blue, Red and Black; 6 sizes: 51, 57, 63 70, 75 and 82 mm (diameter)