Composed of a thin film of strong nonconductive adhesive. Size of adhesive area is 7/16" (11mm) diameter which is appropriate for 1/2" SEM pin and cylinder mounts. Place the "press" portion of the tab on an SEM mount surface. After pressing, pull tab up and a thin layer of adhesive is left on the mount surface. Contents: 72 sheets, total of 2,592 tabs.