512MB 200PIN DDR PC2700 333MHZ oem#M9595G/A,major brand, lifetime warranty,compatible with Powerbook models listed or your money back!(Powerbook G4 12 INCH M9183LL/A 1.33GHZ , Powerbook G4 12 INCH M9184LL/A 1.33GHZ , Powerbook G4 12 INCH M9690LL/A 1.5GHZ , Powerbook G4 12 INCH M9691LL/A 1.5GHZ , Powerbook G4 15 INCH M9421LL/A 1.33GHZ , Powerbook G4 15 INCH M9422LL/A 1.5GHZ , Powerbook G4 15 INCH M9676LL/A 1.5GHZ , Powerbook G4 15 INCH M9677LL/A 1.67GHZ , Powerbook G4 17 INCH M9462LL/A 1.5GHZ , Powerbook G4 17 INCH M9689LL/A 1.67GHZ.If you do not see your model listed call 877-324-5302 for memory upgrade support.($3.00 PRIORITY SHIPPING ANYWHERE IN THE U.S.A.)