661-2818 256 MB SDRam DDR SO-DIMM for Power Book NB-4603W
This is a 256MB DDR PC2100 Ram SODIMM for various Powerbook and iBook models.
Apple part number: 661-2818
iBook G4, G4 (14-inch), iMac (17-inch Flat Panel, 1GHz), PowerBook (12-inch DVI), (12-inch)
661-2818 256 MB SDRam DDR SO-DIMM for Power Book