It's made of stainless steel. Weighs 4 oz.
I used .006 stainless shim stock off a 6" wide roll.
I fabricated the hinges and welded them to the body. The hinge pins are stainless steel rod.
8 inches tall X 5 inches wide/square. and collapses to less that 1/4" thick.
It's just one piece. Has 1" rectangular openings all around top and bottom.
Test burns begin tomorrow.