This is an auction for an autographed 16x20 photo hand signed by Khalil Mack. This photo has been signed in permanent marker and was obtained by myself to guarantee that it's 100% authentic. The photo has been authenticated by PSA/DNA Authentication, the world's leading third party autograph authentication company. A tamper evident label is affixed on the item. The photo will include a PSA/DNA Certificate of Authenticity with identical matching certificate number on both the item and the Certificate of Authenticity.If you have any questions feel free to ask. Thanks for looking