Anyone have the Polaris roto cargo box?

I ordered the cargo box from Polaris and it looks like they sent the cooler model instead of the cargo box. Seems to be insulated and has a drain plug that a cargo box probably would not have.

I really wanted the storage capacity and am thinking that the cooler probably has less interior room. At the inside back wall of the cooler box it measures 20" x 9 1/2" x 13" deep.

Can someone see what the cargo box dimensions are for comparison?