The grinding media are spherical or cylindrical objects that roll inside a ball mill. MITR grinding balls refer to the grinding balls used in conjunction with laboratory ball mill instruments, placed inside grinding jars. These balls are made of various materials and come in different sizes, including stainless steel, agate, zirconia, nylon, and polytetrafluoroethylene (PTFE). Depending on the characteristics of the material being ground, multiple grinding ball solutions are available.