1GB STICK Gateway MT Notebook MT3104b MT3105j MT3107b MT3303j MT3418 MT3421 MT3422 MT3423 MT3705 MT3707 MT3708 MT6220b MT6221j MT6223 SODIMM DDR2 NONECC PC2-4200 533MHz RAM Memory Genuine A-Tech Brand 1GB STICK SO-DIMM DDR2 NON-ECC PC2-4200 533MHz RAM Memory Genuine A-Tech Memory Lifetime Warranty Toll Free Technical Support 1-866-557-4527 Designed For Gateway MT Series Notebook. (See Compatibility List Below)