Lyman's stainless steel tumbling media offers superior cleaning capabilities for brass cases, thanks to its precision-engineered stainless steel pins. Unlike traditional cleaning methods using corn cob or nut shell media, these stainless steel pins effectively reach and clean difficult areas such as primer pockets and the insides of cases. The media is designed with optimal length and diameter to ensure maximum cleaning efficiency. Additionally, the stainless steel construction resists rust and corrosion, ensuring longevity even during storage. Available in 5 lb boxes, this tumbling media is compatible with the Lyman cyclone rotary tumbler and other rotary case tumblers, making it an ideal choice for achieving pristine brass cases. Media pins are precisely dimensioned to ensure maximum cleaning efficiency Stainless steel pins are resistant to rust and corrosion Compatible with rotary case tumblers from all brands Packaged in 5 lb boxes