Compatible with Brother DR-520 ( Brother DR520 ) . Compatible laser toner drum designed for the Brother HL-5240 / HL-5250DN / HL-5250DNT / HL-5280DW laser toner printers. (25,000 page yield - Drum Unit. . Page Yield: 25,000 at 5% usage. Warranty: 1 year. Manufacturer: Jolek Inc . Made in Canada - JVAT Certified Product - Not Imported.The Jolek brand offers incomparable quality and performance, a broad product line with significant cost savings over comparable OEM products. Jolek Premium Imaging cartridges are manufactured in Canada using ISO 9001:2000-certified supplies and are designed, engineered and produced to be a true alternative to the OEM. The entire Jolek line is JVAT Certified and has 100% guaranty to be compatible with all printers.Compatible with Brother DR-520 ( Brother DR520 ) . Compatible laser toner drum designed for the Brother HL-5240 / HL-5250DN / HL-5250DNT / HL-5280DW laser toner printers. (25,000 page yield - Drum Unit. For use in : brother_DCP_8060, brother_DCP_8065DN, brother_HL_5240, brother_HL_5250DN, brother_HL_5250DNT, brother_HL_5280DW, brother_HL_5200, brother_HL_5240LT, brother_HL_5250, brother_HL_5250DNHY, brother_HL_5250DNLT, brother_HL_5280DWLT, brother_MFC_8460N, brother_MFC_8470DN, brother_MFC_8660DN, brother_MFC_8670DN, brother_MFC_8860DN, brother_MFC_8870DW, brother_tn580, brother_tn550, brother_dr520, TN-550, TN-580, DR-520