"I'm sure that this is great ducting. In my house however it is a great wine rack (see told you I was different!). Stack these as you would hexagons. Rivet each end. Put two bottles in each with the bottle necks sticking out each end. Cheap as chips. Looks smashing. If it supports the weight of my homebrew then air ducting is a given . . . ."
"took on new house the cooker hood extraction went though the bridging cabenet above through a flexibal pipe. this keped falling off and bulging round the space the space was filled with grease, so some sugar sope and the round ducting fixed the grease"
"Most people will be wanting to buy this so they can install it through the wall for an extractor fan, so it is really useful that this pipe is sold in lengths of only 350mm and you don't have to buy an enormous quantity which then gets wasted. On the down side, I am an electrical contractor and install at least two or three bathroom/kitchen fans a month, so it would have been useful if able to get it in a 2m or 3m length. But I'm being picky there."