Rev-A-Shelf - 5730-33CR - 33 In. Chrome Pull-Out Basket with Soft-Close Slides

i know the full height is 7" tall but what is it from the bottom to the top of the rack where your items sit on?

Can you mount this to upper cabinet over fridge?

Is it 32.4" wide from rail to rail or is that the pull out shelf width?

Will this support as much weigth as the 5330-33bcsc-mp 33 ?