Troy Polamalu Signed Steelers Authentic Lunar Speed Flex Helmet BAS 34219 The number in the listing title is just an inventory sku for our records and is not the authentication number. The item pictured is a stock photo unless otherwise noted. This is a Pittsburgh Steelers full size authentic lunar speed flex helmet that was personally autographed by Troy Polamalu. Includes a certificate of authenticity from Beckett Authentication Services (BAS) and Denver Autographs.