Rev-A-Shelf5WB2-1218-CR - 12 in. W x 18 in. D Base Cabinet Pull-Out Chrome 2-Tier Wire Basket

how wide is the 9" two-tier wire baskets? it says its 8-3/4" wide, does that include the slides, or is that the width of the basket.

How tall is the unit and is the top shelf adjustable up and down at all?

How much weight can this hold. I have cast iron pans so it will be heavy can this hold the weight?

Can anyone tell me the height (from the base of the cabinet) of the upper shelf when it's mounted in the lower of the two positions?