The 2020 United States Mint Proof Set features uncirculated coins with a copper composition, struck with a proof finish in San Francisco. This set includes coins with a denomination of 25 cents, graded as ungraded, and accompanied by a Certificate of Authenticity from the U. The set also comes with a bag containing the coins along with a Certificate of Origin and Government Packaging, adding to its collectible value for coin enthusiasts and collectors alike.