Firearms have lots of small areas that are difficult to clean. These areas are also prone to carbon and fouling build up. Pipe cleaners - great for hobbies and arts & crafts - are perfect for gun cleaning too. The extra-long length is perfect for cleaning the full length of the impingement gas tube as well as other hard to reach areas. Composed of a flexible wire core and absorbent cotton bristles, these Pipe cleaners are 6'' long and 1/8'' diameter.