My Tilley’s metal screen mantle burned up prematurely. It barely lasted a year. I went back to my asbestos one but wanted another metal mantle. I have a propane reflector heater that utilizes a perforated metal mantle. Why not manufacture one from perforated metal? This is the result. The holes are 2.8mm or 0.113” The metal was a piece of mild steel 0.2mm or 0.087”. I drilled the holes, notched the plate ends and tig welded the seam to form a cylinder. The ends were then formed as shown. This was the result. I’m happy with the heat output. I’m not sure why the pics posted sideways.