RAM & Memory Upgrades
4GB DDR2 667MHz PC2-5300 200-PIN SODIMM MEMORY RAM COMPATIBLE WITH INTEL MACBOOK (LATE 2007 - EARLY 2008) AND MACBOOK PRO (MID/LATE 2007 - EARLY/LATE 2008 - EARLY 2009)
SIZE/CAPACITY: 4GB (1 x 4GB) VOLTAGE/POWER CONSUMPTION: 1.8v CAS LATENCY: CL5 SPEED: PC2-5300 (667MHz) TYPE/INTERFACE: 200-PIN DDR2 SODIMM 200-PIN MACBOOK & MACBOOK PRO DDR2 SODIMM
https://www.bizrate.co.uk/ram_memoryupgrades/4gb-ddr2-667mhz-pc2-5300-200-pin-oid5350297916.html