Iosso Brass Case Cleaner is a quick and easy liquid brass cleaner that removes fouling, tarnish, oil and grime from cases leaving brass bright and clean. A simple immersion in the liquid, a quick rinse and dry is all that is needed. Notes: Effectively removes powder fouling residue, oxidation, tarnish, discoloration, dirt, and grime.Restores brass casings to a bright finish in seconds. Cleans the inside of the casings and the primer pocket. A quart of cleaner cleans approximately two thousand cases depending upon the degree of tarnish and residue.