It'd actually rigid vinyl with a stainless trimstrip over top of it. I know I am not going to find the exact match to it, an I'm not all that worried about matching it anyway. It is a 28' boat and the rail follows some contours, so I don't think it's going to be an easy installation.Is yours extruded aluminum (sold in straight 18' lenghths) or the thinner stuff with a vinyl strip in it?