Alpaca Silver Necklace Choker Band Omega Hook - Alpaca silver choker total length 19.5" omega style. It is 3/8" thick silver overlay with core made of alpaca silver (65% nickel/ 30% zink/ 5% sterling silver). The overlay is sterling .925 stamped. It is a great value and the right look and style to slide a pendant or use plain. Silver choker necklace is 3/8" in width and has a shiny rhodium finish. It looks great worn alone or with a pendant hanging from the loop. Very unique and stylish design.