It's laptop memory... Also used in MacBook / MacBook Pro / and all other new mac's but the Mac Pro and also PC Laptops which supoprt the memory type.
(1x) 512MB 667MHz DDR2 SO-DIMM (PC2-5300) - Retail: $75.00 - $55.00 Shipped
(2x) 256MB 667MHz DDR2 SO-DIMM (PC2-5300) - Retail: $30.00/ea - $20.00/ea Shipped
(1x) 512MB 667MHz DDR2 SO-DIMM (PC2-5300) - Retail: $75.00 - $55.00 Shipped
(2x) 256MB 667MHz DDR2 SO-DIMM (PC2-5300) - Retail: $30.00/ea - $20.00/ea Shipped