These aluminum channel braces are required for roof top air conditioner installs.
They install inside the roof to provide stability for the A/C installation.
Designed for most metal roof systems.
Video available
Kit of four.
Measures 13-7/8 inches in length by 1 inch tall with a 5/8 inch opening. Part number 4749A2121
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Removed the rooftop a/c unit (never thought a 100 pound a/c unit on top of a 1" thick styrofoam roof was a good idea) and replaced with a powered vent fan. Braces stiffened the opening area and gave the screws something some stable to screw vent in to and be much more secure.