The Replacement Ceramic Media for the Moly Bullet Finishing Kit is just what it claims in the name. Ceramic media is used when coating bullets with moly in your tumbler at home. When they get old and you run out look no further for your replacement bucket. This kit is designed to be replacement media for Lyman's Moly Bullet Finishing Kit. The Ceramic Media comes in 1.75 pound package and is the same media that is used with the original kit.