These blanks are made with game used jersey relics from Don Mattingly of the New York Yankees and paired with plastic from a Yankee Stadium seat.

Don Mattingly Relic Blanks:

• Real MLB Game Played Jersey relic. 
• These blanks sold in sierra clones, PSI Baseball, and Jr Sets
  
• Plastic used is from an original Yankee Stadium Seat used from 1975-2009
  
• All blanks will come with one COA per blank.
• COAs are 4" x 6" card stock with foil embossed COA seal.
• Custom tube sizes available (two-three week delivery)
  

Hardin Penworks, LLC, certifies that material supplied to the artisan of the accompanying hand-crafted item was sourced from a game used #23 jersey swatch of Don Mattingly and plastic seat pieces of Old Yankee Stadium.

This material is guaranteed to be 100% Authentic.

Feel free to message us for any questions. 
facebook.com/StadiumPenBlanks/ 
Michael@StadiumPenBlanks.com