Class 101 mold is built for extremely high production. It is made with the highest quality materials, and, therefore, is the most expensive class of mold. Class 101 mold must go through 1 million or more cycles, and the base must reach a minimum hardness of 28 R/C. Molding surfaces must be at least 48 R/C. Cavities, cores and slide cores must include temperature control measure whenever possible. Cooling efficiency is affected by corrosion as the mold ages; so non-corrosive materials are recommended. A guided ejection system must be used.