WHY, because they are going to be used for footing arrows and I don't have any 2215's to use but I have over a hundred of other arrows and was wondering if I had another size with the same inside diameter. AND they are not for me but someone else on another traditional web site. SO, that means I don't have the arrow that is going to be footed to see if I have one that works.
Which comes down to: I am doing someone a favor.
Thanks for asking and your tip.