Cleerline One-Click Cleaning Pens quickly clean standalone fiber connectors or end-faces inside adapters, couplers or ports. They effectively remove light oil, dust and other contaminants without damaging fragile optical lenses and plastic housings. Cleerline Cleaning Pens leverage a dry cleaning tape to provide up to 95% cleanliness for 1. 25mm ferrules (LC connectors) -- no alcohol or harsh chemicals required!Each pen provides up to 800 cleaning cycles by simply placing the tip of the pen on the fiber end-face and "clicking" it forward. Cleerline Cleaning Pens are particularly effective at cleaning hard-to-reach areas, specifically inside adapter ports or on fiber patch panels.