EDGE high performance CF rotor blades are new premium blades that have been specifically designed for today's model helicopters. EDGE rotor blades have been optimized for use with today's light weight, high powered models with increased cyclic pitch. While these blades are ideal for aggressive competition winning 3D performance, they can also be used for more nimble and intermediate flying styles. The new Edge "SE" Rotor Blades, were designed for the more advanced and aggressive 3D pilot in mind...no holds barred. Edge "SE" blades are quicker, and more suited for aggressive 3D flying styles, yet maintain their efficiency and stability in high speed flight. Specification: Length : 693mm Chord - 60mm Root thickness: 12mm Root bolt size: 4-5mm Weight: Approx 185g each