For entertainment purposes only.Performing with this ultimate secret deck marking system will give you the most powerful advantage in card magic possible. At a brief glance you will secretly know any selected card. Become a world class card performer or even a mind reader with MARKED by MAGIC MAKERS...Everything you need to get started is included in this kit.Kit Includes: Printed Marking System Guide Instructional course on the marking system with bonus performance Special Marking Device 25 Bicycle Deck Seals (Standard Black Seals) Bicycle Deck Ready For Secret Marking ApplicationPRODUCT DETAILS - Single Packaged UnitDimensions: 7.6 x 5.3 x 0.9 inchesWeight: 0.4 lbsWARNINGFor entertainment purposes only!User assumes all risk and liability resulting from use of this product.Neither seller nor manufacturer shall be liable to the buyer or anythird person for any injury loss or damage directly or indirectlyresulting from use of or inability to use this product.Get the demo video for direct download(click DOWNLOAD and get the Original .MOV file):http://vimeo.com/user10127709/marked