If you can't find the size brush in this set that you need to clean some kind of tube or keyboard keys or whatever, then I you probably need something larger than what is in this package. You have your choice of 20 in this group. They are split into groups of 10 but each group has a split ring to hold them together. They can be separated but why? My husband's eyes just lit right up when he saw these and of course, they are now his. I will borrow them when I want to do my keyboard or clean areas of my bass guitar that are inaccessible with any cloth.
I received these brushes for free in exchange for my honest and unbiased review.