The Excellart ESP 12 Frame, crafted from domestically sourced 6063-T6 architectural-grade aluminum and representing our standard frame style, serves as a double-faced sign frame extrusion designed for constructing aluminum sign cabinets. Measuring 12 inches in depth, this frame offers straightforward assembly and a wide range of design options. While it does not have built-in retainers, it is compatible with multiple retainers—including LF, F, FF, FF2, and XW retainers—to achieve the desired depth.