Stampers Anonymous' Tim Holtz ATC Time Collage Background Stamp, RETAIL FOR $5.99, SAVE 15% The gray foam pad is already glued onto the red rubber. So just place your new stamp on your acrylic block and you are ready to stamp. The image is printed on the foam so when using it on an acrylic block, you can see the image you are stamping just like you can with clear stamps. Here's what Tim has to say about the stamps. "it includes smaller images than i've normally designed. basically for ATC's, mini collages, memory glass, and any other projects where a little collage element is what's needed."