Frame 2 Channel Type 1 (Mullion Channel). The secondary mullion channel is thinner and allows you to divide up the interior space. (8) 2x4 panels, (4) 4x6 panels.
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Frame 2Channel Type 1 (Mullion Channel). The secondary mullion channel is thinner and allows you to divide up the interior space. (8) 2x4 panels, (4) 4x6 panels.
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