Delta makes the pull-down tub spout in both a non-metalic construction (RP17453) and a metalic version (RP17454). I'm assuming that the metal one is more durable, but they both come with the same finish warranty. The metal one is about 2x the price of the non-metalic one. Is it really worth twice as much? (I guess $25 isn't all that much, but this is a gift for my 84-year old mother...durability probably isn't a big thing!).