This is a set of optional EDGE 325mm Premium Carbon Fiber Rotor Blades, and are intended for use with flybarless helicopters. EDGE high performance rotor blades are premium Carbon Fiber blades that have been specifically designed for today's high performance 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 intended for aggressive competition winning 3D performance, they are also ideal for more nimble and intermediate flying styles. Features: Airfoil designed specifically for traditional flybar helicopters. Integrated lead weight safety harness. Specifications: Length: 325mm (315mm - from hole to tip) Width: 32mm Root: 4.5mm Bolt Hole: 3mm Weight: ~ 24 grams Includes: (2) EDGE blades (4) .15mm shims (4) .25mm shims