Fiber Optic Connector Cleaning Pen,5Pcs Fiber Optic Cleaner, 800+ Clean Times ?Universal 2.5mm Ferrules SC/FC/ST Pen Cleaning Pen for simplex connections are simple to use and highly effective at removing oil and dust contaminants that can negatively impact optical performance. Zeasun Cleaning Pen for 1.25mm connectors.Designed for standard SC/FC/ST. ?How to use? Package Included: Universal 2.5mm Ferrules SC/FC/ST Pen is Designed for Cleaning The Ferrule End Faces of SC,FC and ST Connectors with UPC and APC Polishes. Simple Pushing Motion Engages Connector and Initiates Cleaner, Automatically Advance with Fresh Cleaning Tape ;Low Cost Per Clean,Up to 800+ Cleans. Cleanliness Can Reach 95% or Above.Especially for Water and Oil, Its Cleaning Effect is Far Better Than Traditional Swab Cleaning Rods. Cleaning System Rotates 180for A Full Sweep;Cleaning Micro Fibers Are Densely Stranded and Debris Free. FIELD TESTED : Our SC ST cleaner pens are perfect for use in the field. They make cleaning Fiber effortless when working on either single mode, multi mode, Simplex or Duplex Connectors and cables.100% Customer Satisfaction Guarantee:30 Days Free Return or Refund.