This Riddell NFL Authentic On-Field Speed Flex Helmet was signed by Seattle Seahawks record breaking Wide Receiver DK Metcalf. This is the helmet that Gronkowski wears on-field. DK added the following inscription to the helmet "Seattle's New Beast". For authenticity purposes this item will be accompanied by a Beckett Authentication Service (BAS) Certificate of Authenicity along with a matching serial numbered hologram affixed to the helmet.
