Tungsten Carbide Grinding Jars and Balls Combo | Stanford ...
Each grinding jar and ball combo includes 4 grinding jars with lids, rubber sealing gaskets, and grinding balls. Shipping and handling are free when ordered together with a planetary ball mill. For grinding in vacuum or inert gas environment, stainless steel vacuum jacket will be required for all kinds of grinding jars except for vacuum jars made from Stainless Steel.