These baseballs have been personally hand-signed by Matt Harvey, Jacob deGrom, and Steven Matz. It has been obtained under the auspices of the MLB Authentication Program and can be verified by its numbered hologram at MLB.com. It also comes with an individual numbered, tamper-evident hologram from Fanatics Authentic. The display case features a 1/8"-thick clear acrylic removable lid with an antique mahogany finished base. It measures 9" x 5" x 6."