I have a few sections of Stainless steel double wall class A chimney pipe I need to use to re-plumb my chimney liner with my woodstove's new location. There are no stamped markings on any of the pieces and just a couple had labels but where all heavily disintegrated. I was able to make out a symbol which was a bold "M" with a "V" with it. I've seen this before online but can't remember. I thought it would be Metalbestos but the way the pieces connect seems different from Metalbestos piping. Does anybody know what manufacture these are from? I need another adapter to connect to black pipe.