IRON MARUMAN SG M230 GRAPHT #5-9PHigh resilience with thin high strength face? 1. 9mm ultra thin Maraging face, and 3. 55mm wide ultra deep inner groove?. The face bends flexibly to generate the powerful iron shot with soft feeling. Ultra low center of gravity and large MOI Sweet spot positioned at 19mm from the sole, which is lower than the ball radius, and wide MOI achieved. Easy control of Iron shots. Beauty like a muscle back Same back structure and clear back face appearance as