20MM Vulcan Brass Washed and Polished Rifle Brass Headstamps Are Mixed Unprocessed Brass 5 Brass Cases Add a unique and eye|catching item to your reloading bench with our 20mm Vulcan brass cases. These once|fired cases are not intended for reloading but are perfect for creative projects and display. Ideal for crafting shot glasses, bottle openers, or other custom pieces, they make for a fun and memorable souvenir for firearms enthusiasts.