They are made from aluminium alloy 7001 and tempered to T6 standard. 7001-T6 aluminium alloy is generally regarded as the best aluminium alloy for lightweight tent polesproviding the best balance between weight and strength.
MSR Elixir 1-Person Lightweight Backpacking Tent
MSR Elixir 1 Person Dome Tent - Green
MSR Elixir 2-Person Lightweight Backpacking Tent
MSR Elixir 3 Tent