The team unveiled massive rings after winning their record-setting 18th championship in June’s NBA Finals against the Dallas Mavericks. The rings feature 15 carats of white diamonds, representing the 15 teams in the Eastern Conference. That’s exactly where the symbolism begins.

The ring, made by Jason of Beverley Hills, also has a removable top that reveals a small replica of the championship banner the Celtics raised Tuesday night before hosting the Knicks in the season opener. The inside of the removable lid contains a small, circular piece of the actual parquet floor on which Boston captured the title.

Each ring is also individually designed with a nameplate on the flank of one side, with the player’s jersey number filled in with diamonds.