This autographed full size Riddell Flash Alternate replica speed helmet has been personally hand-signed by Rob Gronkowski of the New England Patriots. This autograph is certified by Radtke Sports. It comes with the Certificate of Authenticity and matching numbered hologram, which can be verified on their website, Radtkesports.com.
We use cookies to enhance your browsing experience and analyze our traffic. By clicking "Accept", or by continuing to use this site, you consent to our use of cookies.AcceptPrivacy policy