avr_fred:
That seller would never see my money... but that's just me. Here's a similar model from a more reputable seller. Reasonable shipping too, especially with a 10pc order.
Hopefully they will stack like railroad cars as we may have 8 of them. (Or eventually 16)
Wish vendors would include dimensions.
Lacking any clips that {unknown} width may have to make a /_________\ slot in a bar of some plastic to slide them in from the end; then DIN-clip the bar to the rails.