Hmmm, looks like this post is running out of steam. Oh well, I'll post this picture anyway in case anyone is interested. This is a picture of the actual cylinder that goes with those keys and the 3 different types of tumblers it takes. Just ignore the other tumblers, they are for automobiles and regular cylinders.
Yip
http://i23.photobucket.com/albums/b367/yippeegollies/tumblers1.jpg