512MB PC133 144pin SDRAM SODIMM Memory for Brother Printer HL-3045CN HL-5240 HL-5250 HL-5280DW HL5240 HL-5250DN HL-5250DNT 512MB printer memory upgrade Part#: Brother -512MB-PC133S 100% Compatible with Lifetime Warranty Manufactured by Keystron, LLC Keystron is a registered trademark of Keystron, LLC