This autographed full size Riddell replica Salute to Service Alternate Speed helmet has been personally hand-signed by Troy Polamalu of the Pittsburgh Steelers. This autograph is certified by Beckett Authentication Services (BAS) Witness Certification. That means that a Beckett representative was present when this item was signed. It comes with the numbered authentication hologram with a QR code that verifies the authentication on the Beckett website.