This is a belt of 25 fired 20mm rounds from a MK 15 Phalynx Close-In Weapons System (CIWS) also known as a Sea-Whiz. These were shot off of DDG-61 The Ramage. I'll take $100 for them. Or I'm open to offers. They're kinda hard to come bye because they're supposed to be kicked overboard. Something about the depleted uranium rounds or something. I dunno. They made it into my seabag and came home. They look pretty cool hanging on the wall in my gun room. The strand is about 36" long and each shell is about 3 to 4 inches tall. Each shell is stamped 20mm M103 ACN, along with some other specs.