Steep pitch metal roof flashings


I am currently installing snap lock panels on an 11/12 pitch . My question is this, is there a dektite flashing for steep pitched metal roofs. I know that you can get flashings for steep shingle roofs. Our metal shop guy can make the flashing out of flat stock, but I was just wondering if any of you had heard of one?


Are you talking about something like these?

My supervisor gave me a round one to use. The problem is that with the steep pitch the dektite barely reaches the bottom side of the pipe. I cannot use one with a larger base because it is a 4" flue pipe and as you know the hole would increase in size as you get a larger base. I was wondering if anyone had any experience with the square based ones?