BrabantiaRadiator Hanging Clothes Dryer, Mentallic Gray (105241)

Q: What is this made out of? Is it plastic or metal?

It is metal. It fits over my door and is secure. Working well for drying clothes.

Q: What are the dimensions?

Tall flat out 34 1/2ins, wide flat out wide 75ins up "Y" 60ins tall.

Q: What is the Width? 17.32 or 26.77? The part that goes over door?

When folded closed, it is 17.32 deep by 27.66 wide. The dimension over the door isn't given. However, when in use and fully open, it's almost a square. So that dimension is closer to 27 inches than 17 inches. It's really terrific, I love mine and use it all the time plus it takes up no space.