Mama Bear outlet dimensions needed

[acp104]

Does anyone (Coaly?) happen to have any prints are dimensions for the outlet for a Mama Bear? I'd like to return the outlet to closer to original on the stove in the picture. I'm not sure how thick the material was that was used originally, but I was considering using a piece of 6" schedule 40 pipe so that the ID would be 6" and I wouldn't have to worry about over crimping stove pipe to fit an original type 6" OD outlet. Looks like schedule 40 is a hair over .25" thick. I'm thinking this might be considerable heavier than the original?

 

[coaly]

That's a good material to use.
The original part listed on drawings for the older stoves is part # 111-BS called FLUE made of 6" OD X 12 GA X 5 ".
3 inches is required to insert into firebox.