hello i am going to need 20ft of 4" ss flex to go up and vent out the chimney. in my early search all of these companies claim that they have the best. i would like to buy something that is going to last and not give me any problems. i would like to get some recommendations on what people are using and what you would suggest. i was also interested who sells 2 3/8 for the harman accentra insert oak.
thanks
thanks