Mizuno Pro has always been Mizuno's most forward-thinking series - cutting edge engineering concealed within precise playing profiles preferred by the game's elite players. Pro 243 PRODUCT FEATURES Grain Flow Forged HD (4-7 Iron) From a single billet of 4120 Chromoly steel in Hiroshima Japan for unmistakable Mizuno feel through impact. Grain Flow Forged HD (8-GW) From a single billet of 1025 Elite Mild Carbon Steel in Hiroshima Japan for the ultimate in precision, control, and feel where needed.