This puck has been personally hand-signed by William Karlsson. It is officially licensed by the National Hockey League 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. Each case is made of 1/8'' thick acrylic and features a black acrylic base. It has a clear acrylic removable lid engraved with the team logo and a collage of images. This product is officially licensed by the National Hockey League. The display case measures 10'' x 5'' x 5.5.''