Goes with the Coil EG Warflat conversion. Helps make both sizes of hood, and note the hoods are not symmetrical as each has one side slightly longer than the other (see Paul Bartlett's photos of the support bar mountings to see why, and how to put things together accordingly). Updated model 12th Jan 2015 to make the tent the correct width and height, and the end tags long enough to overlap and cover the ends fully when they are folded down and glued. Will be sold with the triangular jig for making the support bars when I'm sure the rest is right. UPDATE made for sale without the triangular jig for making the sheet support bars as you don't really need the bars. The hoods stay up on their own.