Brother DR-520 Drum Do It Yourself Kit by TRS Brother Sale! from 3295 /per Qty. Add to Cart This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. Brother DR-520 Drum for the Brother TN-550 TN-580 TN550 TN580 Toner Cartridge Do-It -Yourself-Kit!!