Hardware Resources 3" "No Wiggle Base Cabinet Filler Pullout, White Birch

The dimensions that I see for this item are listed as "Package Dimensions" at 34 x 26.9 x 6.9 inches - are these the measurements of the actual unit?

what are the actual dimencions?

I’m downsizing from a 30” stove to a 24”, would this work for the 3” space left between the cabinet and the stove?

Do you need a base/frame for it to install? Or does it come with everything except a face?