aimTape pro.Dotz specially produced PTFE points [dots] which have also already been punched in exactly the form - thus fit precisely to the respective feet of the mouse - Made of 100% quality PTFE - long shelf life - compatible with Microsoft IntelliMouse Explorer 3.0 / 4.0 & IntelliMouse Optical 1.1 / 1.1 SE - contents: two sets for two applications