MSE-My Sentiments Exactly Mounted Stamp. MSE rubber is deeply etched, cushioned with a sticky side and precision cut to eliminate shadowing. If your unmounted system requires only the red rubber part the cushion can be removed easily. Stamps are available in a wide variety of themes and designs for every day and every occasion! This package contains Happy Birthday: one stamp mounted on one 1-1/2x2 inch block. Made in USA.