| I used these for the Dungeon Crawl Classics tourney in 2007. They stand up pretty well when you have a couple linked together. (Each wall piece is an individual one-inch. The link pins are fairly sturdy, but I have had a couple snap off in the two years since I got them). The doors are separate and stand up fine also. They now have a magnetic adapter set for them that you can use with their magnetic receptive battle mat, and those stand up to major table-shaking punishment.
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Cheers!
Noffham | 
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