These 135 degree corner sections are designed to make building oct agonal structures easy and accurate.
They incorporate scale 4" corner boards, which are designed to sit .015" proud of the .040" scribed styrene sheet commonly used to build structures. They extend behind the siding, to give a gluing surface .080" wide. This will give great rigidity and a very strong bond. I recommend using ACC cement to bond the FUD and styrene pieces, as solvent cement will not affect FUD.
Six pieces, 6 inches long, are included per package.