RAM & Memory Upgrades
1GB (2 x 512MB) PC133 133MHz 144-PIN SDRAM SODIMM & 168-PIN SDRAM DIMM MEMORY RAM KIT COMPATIBLE WITH IMAC G4 FLAT PANEL 700MHz/800MHz
SIZE/CAPACITY: 1GB KIT (2 x 512MB) VOLTAGE/POWER CONSUMPTION: 3.3v CAS LATENCY: CL3 SPEED: PC133 (133MHz) TYPE/INTERFACE: 168-PIN SDRAM DIMM & 144-PIN SDRAM SODIMM 144-PIN SODIMM&168-PIN DIMM IMAC G4 FLAT PANEL KIT
https://www.bizrate.co.uk/ram_memoryupgrades/1gb-2-x-512mb-pc133-oid4017659133.html