Walnut Media Untreated 12/20 (5 LBS.)

You Receive One 5 Lb. Polly Gusseted Bag Of High Grade Black Walnut 12/20 Media. For The Ultimate In Cleaning Dirty Cases crushed walnut shells are extremely durable, angular and multi-faceted, yet considered a 'soft abrasive'. Excellent durability; reusable.

Cleaning Your Brass Will Help Reduce Wear And Tear On Your Expensive Reloading Dies,And The Chamber Of Your Firearm. Grit And Grime From Uncleaned Brass Gets Embedded In The Inner Surfaces Of Sizing Dies, Scratching And Marring Every Case There After. The Same Grime Will Accelerate Wear In The Chamber And Feeding System Of Your Rifle Or Handgun.

Biodegradable Non-toxic - no health or environmental hazards Excellent media for tumbling and vibratory operations Reduces cycle time of finishing operations

The Numbers: In the case of 12/20 the 12 designates that the media is going through a screen that has 144 holes per square inch (12x12=144) and the 20 designates the screen size per square inch (20x20=400) that the media rests on after going through the 12x12 size screen described above.