Riddell 49ers Alternate Amp Revolutions Full Size Speed Replica Helmet - Brand new in box. The item "Riddell 49ers Alternate Amp Revolutions Full Size Speed Replica Helmet" is in sale since Friday, November 8, 2019. This item is in the category "Sports Mem, Cards & Fan Shop\Fan Apparel & Souvenirs\Football-NFL". The seller is "jerseyframing199" and is located in Michigan. This item can be shipped to United States, Canada.