We had an enquiry about long vents. Now I have to say that the standard lead flashing is 9 inches unfolded, so when its 11 or 12 inches this could be someone that basically put two together instead of cutting the pipe down. Regardless, we make our shields in two lengths so if you have a long vent we can cover it. Make sure you write us on the “get info” tab to let us know you got one.