Titleist PRO V1 3.75 dozen (45 balls) - New, Unused. The model year is 2021, but they have been stored in a dark place in my room, where the temperature and humidity are constant throughout the year, so I believe they are in very good condition even among new, unused items. They still have the exact same smell as when I first bought them. These are "play number" balls, which I purchased during a limited-time opportunity from the Titleist official website to specify the ball numbers. Play number balls are rare, and of course, the numbers themselves are also rare. I selected numbers considered lucky in golf, choosing five dozen from the top, and then picked up one sleeve of 3 balls each from each number to mix and use for rounds. Since that was enough, these are the remaining 9 balls each of each number, making up 5 boxes. The numbers are: #6 #8 #15 #23 #31 This configuration is 9 balls of each number per box, for a total of 45 balls. No individual sales, no returns or exchanges. Please refrain from price negotiations.