Really heavy. I guess that means good quality pressboard, but I’d hate to try to mount it on the wall. Part E was pre drilled for 2 cams, not 4 as shown in instructions, so it does not attach to top as well as it should. After putting doors on and adjusting so the locks lined up, there was still a 5/8” gap at center front. That means the contents show when fully closed. Not a good look. I finished with 4 rolling casters and rolled under my desk extension. It worked, but I’m not bragging on it.