The AF43ST is a NEMA 1 surface-mount front panel for load centers, sized at 43 in x 20.25 in. It covers the front of a breaker panel enclosure in a standard residential or light commercial distribution board.
This is a sheet-metal front, not a dead-front trim — verify the enclosure backbox model matches the 43 in x 20.25 in cutout before ordering. The NEMA 1 rating means indoor use only, no gasket seal against moisture.