1GB STICK For Apple PowerBook Series G4 1.25Ghz (15-Inch) G4 1.33Ghz (12-Inch) G4 1.33Ghz (15-Inch) G4 1.33Ghz (17-Inch) G4 1.35Ghz (15-Inch) G4 1.5Ghz (12-Inch) G4 1.5Ghz (15-Inch) G4 1.5Ghz (17-Inch) G4 1.5GHz (17-inch) (SuperDrive) (M9462LL/A) G4 1.67Ghz (15-Inch) G4 1.67Ghz (17-Inch) G4 1Ghz (15-Inch) (DDR) G4 1Ghz (17-Inch) G4 A1094. SO-DIMM DDR NON-ECC PC2700 333MHz RAM Memory. Genuine A-Tech Brand. 1GB STICK SO-DIMM DDR NON-ECC PC2700 333MHz RAM Memory Genuine A-Tech Memory Lifetime Warranty Toll Free Technical Support 1-866-557-4527 Designed For Apple PowerBook Series. (See Compatibility List Below)