Ball Mill Jar 5 Litres Alumina 997 Cylindrical Ball Mil Jar. About our program of grinding jars.name equivalents jar, grinding jar, m252hle, maalpot, pot mill, mill containers.our program of grinding jars includes jars from alumina 997, al2o3, cast polyamide, hard paste porcelain, steel and stainless steel.we have cylindrical jars for jar rolling machines and also rotary jars for speed mills.the.