Acer TravelMate 4000 Series compatible 512MB 266MHz DDR SO-DIMM Black Diamond memory. Compatible computer model: Acer TravelMate 4402LMI, 2355LCi, 250E Series, 370 Series, 2700, 2305LCi, 4402, 2600 Series, 4402WLMI, 290 Series, 240 Series, 250 Series, 250PE Series, 4000 Series, 4402LCi, 2100 Series, 662LMi, 4010, 660 Sereis, C110 Series, C111 TCi, 293LCI, 4500 Series, 3200 Series. Black Diamond Memory offers the most extensive line of memory solutions today. With our decades of experience specializing in memory, Black Diamond Memory is a proven manufacturer to the semiconductor industry. Our great products combined with our world class service and support have helped us to where we are today. When you have an Black Diamond memory chip, you can count on it being the best available memory for your system. Our system specific Branded Memory line delivers in performance, and is designed to be guaranteed in compatibility with your system. Each of our memory chips come with a lifetime warranty for your peace of mind. Use our Upgrade Configurator to easily find the correct memory module for your system. Please keep in mind that this memory will ONLY work on the models listed above. 15% Restocking fee will apply for non-defective items.