Each sealed box contains 36 packs with 10 cards per pack. Look for (1) Game-Used Memorabilia Card or a 1 of 1 Printing Plate per box on average. Look for randomly inserted Autographed 1989 Fleer Ken Griffey, Jr. Rookie Cards. Key Rookies: Conor Jackson, Jered Weaver, Prince Fielder, Adam Wainwright, Jon Lester, Hong-Chih Kuo, Joel Zumaya, Ryan Zimmerman, Josh Barfield, Ian Kinsler, Kendry Morales, Justin Verlander