This is a set of (4) CD 735 M & B U.P.R.R. threadless insulators. Photo is a collage showing both fronts and rear sides of all 4 insulators. 3 insulators have base repairs from breaks which I have closeup photos of at req and one is a marriage of cobalt top and another UPRR base. Colors are: cobalt blue, blue, green and blue aqua. Good set for someone who wants the rare ones but All sold individually.