Review on Brother DR820 DR-820 Compatible Drum Unit Replacement | Toner Bank for HL-L6200DW MFC-L5850DW HL-L6200DW MFC-L5900DW MFC-L5700DW HL-L5200DW MFC-L6800DW Printers - 1 Pack by Viswanath Badasz

I bought 4 packs for my printer over 4 months ago. Since using them for the past 4 months, my copies have large black spots on each side. I thought it was the toner so I replaced some toners and tried all 4 drums with the same result. I was ready to buy a new printer. I finally bought a new Brother retail drum from Staples recently and as soon as I replaced the drum the copies were perfect again. your time and money on this product.