Does this support box look familiar?

[Kurt Huber]

I’m having a nightmare trying to figure out how to install my used chimney.
In good shape.
Most parts are labeled Simpson Duravent.
Trying to add to and install this. Here is a look at the bottom of the support box. Does this look common? Am I missing a piece to install duravent dvl . The class A on the upper side has a weird connection as well.
I can’t seem to get the connection right at the support box and can’t afford all new pipe!
Any help is much apreciated

 

[webby3650]

That’s a modified Selkirk/super-vent support box. Your pipe is also compromised, you shouldn’t be able to see any insulation. Best to just start over at this point. The 2 parts can’t be combined even if they were in good condition.