OSHM41 OMPHOBBY M4 MAX RC HelicopterDescription OMPHobby M4 Max is based on the proven M4 air frame with all its beloved features. Swinging 420mm blades, the MAX brings much lower disc loading enabling smoother and more dynamic flying styles with a much floatier feeling. Key Features: Based on the proven M4 airframe with all its beloved features Designed by Jonas Wackershauser Three new, tri colored, highly visible canopy designs Fits up to 420mm main blades RotorTech 420 Ultimate, the