There are six routines given in the DVD but you'll come up with your own. Basically, a selected card penetratesthe glass, then changesinto a differentselected card while that one is behind glass. There’s a beautiful hand-made gimmick. Easier than Tarantula but harder than the Ball & Vase. You won’t have problems.  There are several ways to perform the effect. In the most difficult routine you do a force and a top change. In the easiest you simply make the card change behind glass. The reset is instant. You’ll have a perfect time making your reputation with WINDOW. Order it today.