This is a replacement KBDD International 600mm Carbon Fiber Extreme Edition Flybarless Main Blade Set. These Flybarless Carbon Fiber main blades feature a distinct orange/yellow/white color scheme and deliver a striking appearance that looks as good in the air as it does on the ground, with performance to match. For use with 600 size helicopters.
Blade Root: 12mm
Hole Diameter: 4mm
Weight: 135 - 140 gram
RPM Rating: Optimum Hard 3D Flying