This authentic series indoor / outdoor basketball has been personally hand-signed by Dirk Nowitzki. It is officially licensed by the National Basketball Association and comes with an individually numbered, tamper-evident hologram from Fanatics Authentic. To ensure authenticity, the hologram can be reviewed online. This process helps to ensure that the product purchased is authentic and eliminates any possibility of duplication or fraud.Made in the USAPersonally Autographed by Dirk NowitzkiFanatics Authentic Presented by Mounted MemoriesIncludes tamper-evident hologram to ensure authenticityOfficially licensed This product is guaranteed authentic and includes a Fanatics Certificate of Authenticity and an accompanying tamper-evident Fanatics Hologram.