Frankford Arsenal Brass Cleaning Media - Corn 7 lbs. is one of the more popular choices for reloaders. This media is specially designed to eliminate grit dirt as well as residue from brass cases. As such the reloading die stays in tip-top condition. The 7-pound container of corn cob media comes in a plastic bag with a sieve of 16/20. The media is made to be used for multiple reloading sessions but to keep performance at its best the manufacturer recommends occasional replacement.