Oh, what the heck. I'll tell you.
I got one of those from Amazon today. The tag on the shrink wrapped package read 02853, but a 02852 was inside. It's way shorter than the 02853, so can't be low density. I couldn't find any reference to a Camco 02852 anywhere, but did a quick test and it did draw 12 amps at 125V, so it is 1500W. But the surface area is way too small.
Just tried ordering the same element from these guys
. I added a note asking them to compare the number on the packaging to the number on the element. I'll let you know what they deliver.