Najee Harris Autographed Pittsburgh Steelers Speedflex Helmet FAN 42624 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 SpeedFLex Helmet that was personally autographed by Najee Harris. Includes a certificate of authenticity from Fanatics Authentication (FAN) and Denver Autographs.