A-Tech 1GB STICK For Apple iBook Series G4 1.0GHz 12'' G4 1.25GHz 12'' G4 1.25GHz 14'' G4 1.2GHz 12'' G4 1.2Ghz 14'' SO-DIMM DDR NON-ECC PC2100 266MHz RAM Memory 1GB STICK SO-DIMM DDR NON-ECC PC2100 266MHz RAM Memory Genuine A-Tech Memory Lifetime Warranty Toll Free Technical Support 1-866-557-4527 Designed For Apple iBook Series. (See Compatibility List Below)