512MB STICK For Brother HL Series HL-2700CN HL-3040CN HL-5240 HL-5250DN HL-5250DNT HL-5270DN HL-5280DW. SO-DIMM SD NON-ECC PC133 133MHz RAM Memory. Genuine A-Tech Brand. 512MB STICK SO-DIMM SD NON-ECC PC133 133MHz RAM Memory Genuine A-Tech Memory Lifetime Warranty Toll Free Technical Support 1-866-557-4527 Designed For Brother HL Series. (See Compatibility List Below)