OK I spend most my time on here in the boiler forum but a very good friend and I went to look at a wood stove for his "cabin" off of CL. The stove needs some cleanup and stuff that he's not too worried about but has a strange adapter that comes out the top to connect the stove pipe to. Its rectangular in shape 3.5 inches wide by 14 inches long theni goes to an 8 inch flue. Sorry no pics he didn't buy the stove because I've never seen one and neither has he. It looks like a floor register vent duct adapter but made out of heavy gauge black stove pipe. Also no real info on the stove I couldn't find a manufacturer name on it anywhere. Thanks all. Any help appreciated in advance.