mpo55The MP55 Melting Point System measures melting point and slip melting point automatically in the range from room temperature to 300°C. Save time by measuring up to 3 melting pointMizuno MP-55 Yoro Craft Irons – In Japan Mizuno offers the MP-55 instead of the MP-25 why? I don’t know but I do know after hitting the MP-55’s that they are indeed special