Shop our Chain Link Rail End Cups which are available in Pressed Steel, Malleable Steel, and Cast Aluminum. We carry Rail End Cups that are for residential, commercial, and industrial applications, in both standard and combo configurations. We even carry black, brown, and green! Rail end cups are used to attach top and bottom rails to posts and walls and we have them in 1-3/8", 1-5/8", 2", and 2-1/2" rails.