Featured is a Troy Polamalu signed Pittsburgh Steelers full size speed authentic eclipse helmet, in which he added the "HOF 20" inscription. This helmet was hand signed by Troy Polamalu in the presence of a Beckett authentication representative. Included with the helmet is a Beckett witnessed hologram and certificate of authentication. This helmet would make a great addition to any sports memorabilia collection.. SPECIFICATIONS Autographed By: Troy Polamalu Team: Pittsburgh Steelers Sport: Football Authentication: Beckett Grading Services