Ultra Pro - closable covers for magnetic holders with an adhesive strip protect the magnetic holder (card case) from scratches and dust. By doing so, they extend its lifespan. You can use them for all types of holders from the thinnest up to a thickness of 260pt. They are also used in the packaging and storage of cards. For example, when you want to additionally protect cards in toploaders, or simply wrap cards. By putting the cards in the envelopes and closing them with an adhesive strip, you will achieve a similar effect as when the cards are still in the packs.