Brother DX FEED ASS A4 ELL (D008U1001) is a duplex tray component for compatible Brother printers. It is listed as a duplex unit, providing the printer's duplex paper path for two-sided printing.
Brother's ELL series parts list specifies this part for HL-L2370DN, HL-L2371DN, HL-L2372DN, regional versions of HL-L2375DW, and HL-L2376DW. The exact part number is D008U1001. This description covers the tray component identified by that part number; the listed printer models define its documented compatibility.