MAH introduces their new version 710mm and 690mm main rotor blades featuring a non tapered leading and trailing edge, 64mm chord, high speed slippery airfoil and tip, and ultra ridged design for popping collective and cylic response. Both versions are for 4 or 5mm blade bolts and use a 12mm root for universal heli fitment. Weights range from 180 grams to 190 grams. Tips and root ends are white for highest visibility in flight. For ultimate 3D performance, these are the blades to use.