About this item Quick and Fast Effective CleaningFiber optic connector cleaners provide fast and effective cleaning of connector end faces, including unused jumper connectors and connectors with adapters inserted. Safety and Reliable ProductThis cleaner can remove dust, oil, and other debris on the end face of the casing without damaging or scratching the end face. Why We Need to Clean the Fiber End Face90% of optical fiber connection failures are caused by contamination of the end face of the optical fiber. It is important to ensure that the end face is clean for network transmission. Dirt or debris that accumulates between the two end faces of the connection can cause permanent damage such as cracks, scratches, and dents. Over 800 Times CleaningUse a dry cleaning cloth to replace the solvent requirements. One-touch design, one push, one second cleaning, can clean more than 800 times 2.5mm SC FC ST fiber connector. Clear Monitoring WindowThis fiber cleaner pen comes with a clear windo