Single-fiber port cleaner for all 2.5 mm ferruled connectors such as FC, ST Compatible and SC; effective for PC, UPC and APC polishes Corning Cable Systems Single-Fiber Port Cleaners are designed to clean connector end-faces in patch panels and adapters. An integrated dust cap allows for cleaning unmated connector end-faces. Single-fiber port cleaners are proven effective for removing the following from connector end-faces: skin oil, hand lotion, Arizona road dust, pre- and post-mate graphite, salt, isopropyl alcohol residue and distilled water residue. These cleaners are easy to use and offer over 525 cleanings.