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The Structural Concepts 21-31618 is a left-hand short support end roll down assembly by Structural Concepts, intended as an OEM replacement component for roll-down systems. The part is sold each as STC21-31618 and provides structural support at the roll-down assembly end. Physical dimensions are 8.5 in length, 6.75 in width, and 0.75 in height, which inform fit and mounting considerations for compatible equipment.
Left-hand short support end for roll-down assemblies; OEM replacement (MPN 21-31618 / STC21-31618); Dimensions 8.5 x 6.75 x 0.75 in.
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