The product is a set of 12 vintage Wilson ProStaff golf balls with a compression of 90, made of Surlyn material, and in their original packaging. The set includes 4 boxes of 3 balls each and is a custom bundle. These golf balls are from the United States and have not been modified. Perfect for golf enthusiasts looking for a unique set of vintage golf balls with a classic design and high-quality construction from a reputable brand like Wilson.