Pre-separated, 7mil, double polished unplasticized vinyl flips are a safe and reliable way to store and process coins. Guardhouse flips do not require tearing to separate and feature rounded corners that will not poke or cut your hands. These flips are about 20% thicker than other standard coin flips, and designed for medium to long term storage needs. These holders are suitable for coins up to the size of a large U.S. one dollar coin (Morgan, Peace, Ike, etc. - 38.1mm or about 1.5 in.). They ARE NOT suitable for silver eagles (40.6mm or about 1.6 in.). Remember to take the thickness of the coin into consideration when trying to determine if it will fit in these holders. Coins the same size as a large U.S. dollar (or larger), but thicker, will probably NOT fit in these holders. These holders DO NOT COME WITH INSERTS.