A-Tech 2GB KIT 2 x 1GB Toshiba Satellite A135-S4527 A135-S7403 A135-S7404 A135-SP4016 A135-SP4036 A135-SP4048 A135-SP4058 A135-SP4088 A135-SP4108 SO-DIMM DDR2 NON-ECC PC2-5300 667MHz RAM Memory 2GB KIT (2 x 1GB) SO-DIMM DDR2 NON-ECC PC2-5300 667MHz RAM Memory Genuine A-Tech Memory Lifetime Warranty Toll Free Technical Support 1-866-557-4527 Designed For Toshiba Toshiba Satellite. (See Compatibility List Below)