Check the listing for details. FHC Square Low Profile End Caps Brass Material 2 Per Pack Satin Brass Finish. Condition: New. Listed at 11.82 USD. They are manufactured from Brass material, which forms the core structure of the component and supports the intended end cap function. Key physical specifications include a precise Length of 3/4" and a matching Width of 3/4", which define the required size for the end cap to fit the receiving component.