The C6 Lens Cleaners from Carson contains our dry nano-particle cleaning formula that wipes away smudges, grime and fingerprints with ease. The soft tip is safe and easy to use on all lenses. The C6 Lens Cleaner also includes a retractable brush to remove dust and debris. It's sleek and compact design make it easy to fit in your camera bag, purse, binocular pouch or pocket. The C6 Lens Cleaners are perfect for cleaning any lens including binoculars, spotting scopes, camcorders and cameras. All of the C6 cleaners are alcohol and ammonia free so you don't have to worry about any lens coatings getting damaged while cleaning your optics. All C6 lens cleaners have a carbon based reservoir built into the lens cap. After you are done using your C6 lens cleaner, just push the cap back on and twist the cap in order to replenish the tip of your lens cleaner with additional specially formulated carbon. The C6 lens cleaners are available in 4 unique sizes that all have curved, soft rubber tips to ensure your optics are completely clean, fully covered and protected. The CS-10 has a 14mm tip size and is a more full sized lens cleaner. The CS-20 has a 13mm tip but has a more compact, smaller and portable size. The CS-15 has the smallest tip (8mm) size and was designed to clean mirror-less camera lenses and other optics that have lenses with smaller surface diameters. The CS-40, jumbo sized version has the largest tip (20mm) of the group and was designed for cleaning optics with larger objective lens diameters. At Carson, we strive to make sure our customers are 100 percent satisfied with the quality of our products. We are so confident in our products that we back them with a One Year Limited Warranty! This Carson product is warranted to be free from defects in material and workmanship for a period of one year from date of purchase. Please contact Carson for additional warranty details.