These roll up holders are great! I have used them regularly for a few years now, and would not smoke without one! I don't have yellow fingers anymore! my friends like them, and told me to make them more available to the UK market, so here we go! I have many that I bought from China, these are designed to take 6mm slim filters, not extra slim 5.3 mm such as swan, just order them from bull brand, as I do, much cheaper. these are the latest trend, so get in quick! only have 200 to sell L