DURAGADGET Double Ended 2in1 Anti-Static Lens Brush Cleaner Pen for Serious User 10x50 Binoculars, Celestron 71008 25x70 Skymaster Porro Prism Binoculars & Nikon Aculon A211 16x50 Binoculars Tactile, ultra-fine, soft hair lens pen will keep your expensive Binoculars dust free Unique pen tip flexes accordingly to match lens contours, allowing for maximum dust removal The special LensPen cap replenishes the tip with cleaning compound each time it is replaced and twisted a half turn. The retractable brush, made of soft, natural bristles, is used to dust away any hard particles Apply gentle pressure and use smooth circular motions to remove smudges, essential for any serious Binocular user