2GB KIT (2 x 1GB) For Toshiba Satellite M Series M45-S3551 M45-S3552 M45-S3553 M50 M50-S418TD/M50-S4182TD M50-S5181TD/M50-S5181TQ. SO-DIMM DDR NON-ECC PC2700 333MHz RAM Memory. Genuine A-Tech Brand. 2GB KIT (2 x 1GB) SO-DIMM DDR NON-ECC PC2700 333MHz RAM Memory Genuine A-Tech Memory Lifetime Warranty Toll Free Technical Support 1-866-557-4527 Designed For Toshiba Satellite M Series. (See Compatibility List Below)