Worked fine on a 6"" pipe with a short ""L"" behind the stove.
"The brush was softer than expected. It was fairly easy to get it around the short bend and up 20' of 6"" pipe. It broke through the plug at the top easily and did a good job with the rest. Swept with a shop vac sharing the entrance. So glad to be able to do this myself from the inside after 30 years of depending on a chimney sweep who swept from the roof and couldn't always make it when I needed him most."