1GB KIT (2 x 512MB) For Sony Vaio PCG Series PCG-K15F PCG-K166P PCG-K17 PCG-K195BP PCG-K195HP PCG-K20P PCG-K215B PCG-K215HP PCG-K215M PCG-K215S PCG-K215Z PCG-K22F PCG-K22P PCG-K23 PCG-K23F PCG-K24FP PCG-K25 PCG-K25F PCG-K27 PCG-K315M PCG-K315S PCG-K315Z PCG-K33 PCG-K33F PCG-K33P PCG-K33Q PCG-K35 PCG-K35F PCG-K37 PCG-K415B PCG-K415S PCG-K43F PCG-K43Q PCG-K45 PCG-K45F PCG-K47 PCG-K64. SO-DIMM DDR NON-ECC PC2100 266MHz RAM Memory. Genuine A-Tech Brand. 1GB KIT (2 x 512MB) SO-DIMM DDR NON-ECC PC2100 266MHz RAM Memory Genuine A-Tech Memory Lifetime Warranty Toll Free Technical Support 1-866-557-4527 Designed For Sony Vaio PCG Series. (See Compatibility List Below)