SE stands for “Scale Effect” These new fibers are the same fibers as the EP Fibers and EP Fibers 3D but they will allow you to tie any minnow pattern with greater three dimensional effect. In fact because of the crimp in it, you will need to use less fibers than the regular one or you will overdress the patterns. Try them; I am sure you will like them. EP Fibers SE are 10” in length.Do you need help? Do you have any questions?Ask a question and we'll respond promptly, publishing the most interesting questions and answers for others.