This is a mini helmet that has been hand signed by Rob Gronkowski. This item has been certified authentic by Radtke Sports and comes with their tamper-proof sticker.This is a stock item. We have several of these and you will receive one that is of equal quality.We pride ourselves on selling 100% certified authentic autographed memorabilia. We have a full time retail store in the Jefferson Valley Mall in Yorktown Heights, NY.Located at:BG Autographs650 Lee BlvdYorktown Heights, NY 10598BG Autographs assures that this item contains a genuine and