We made these rails for home dangling in our doorways, but they would be nicely suited to a variety of training applications; system wall, campus board, backyard ship, or whatever random structure you've got.
Approximate measurements are: a little shy of 14" long, 2" wide, and 1/2" deep. The radius of the edge is a nice 1/4". It sports a gentle 80 degree incut on one side and a flat 90 edge on the other side. Five screw attachment.