1” Field-Lok panel is a non-structural mechanically seamed single-locked or double-locked roof panel that is installed with an expansion or fixed clip.
Commercial - Fabral
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2 Field-Lok, Double-Locked Roof Panel
Metal roofing panel - 1 FIELD-LOK - ATAS International - standing seam / colored / curved
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Standing Seam Single Lock Panels - Copper, Steel, Aluminum, Zinc