Just found in a old box of items. Its a Wilson Combat Custon Tune spring kit #178 for S. & W. K, L, N, frame revolvers. Its been opened and has the reduced power hammer spring. Which may or not be new. Envelope with the 3 springs has been partially opened except the section holding the 13# spring. In the envelope loose are 2 other springs which are probably used ones. If any member can use this one spring. Just speak up then in PM give me your shipping info