Wood
I added one just to the right of the existing ones over the sink and in front of the couch.
I have also added a bunch of coat hangers, as well as a new large medicine cabinet in the bathroom.
I added another floor to ceiling one with drawers on the bottom, cabinets on top and an electronic charging station in the middle which I affixed to the wall studs just beside the door.
We love our Pioneer, and with the zillion additions I have made, it is truly ours!
Jack L
Jack & Nanci