This is a refill of flies and is an assortment of 25 tandem and single trolling streamers to add to your collection. If you ordered an Advent calendar last year, or just want a great selection of streamer flies for your local waters, this is a great choice. Packaged, numbered, and ready to tack back up on your existing advent calendar board. If you don't already have a board, see my other selections. :) Makes a great gift all on its own also.