999 Silver (one gram) bar. The sets are uncirculated and have not been certified. They were struck in Philadelphia and are composed of silver. These proof sets are a great addition to any collection for anyone interested in collecting US coins. The sets come in holders and are perfect for storing and displaying your collection. Don’t miss out on the opportunity to add, PROOF SETS & SILVER BULLION to your collectiom. WE are going away for 4 weeks and taking E/Bay down in 3 days back 12/5/2024. IF you want anything else. I will add 50 holders free. THANKS for the feedback.