Lenovo ThinkPad X41 2525 compatible 1GB 533MHz DDR2 SO-DIMM Black Diamond memory. Compatible computer model: Lenovo ThinkPad R52 1846, T43 2687, R52 (1859BAU), R52 1862, X60s 2533-xxx, R51e 1844, Z60t 2511 Special Edition, R52 1863, R52 1849, Z60m 2529 Special Edition, X41 Tablet 1869, X41 2528, R52 1870, R51e 1843, T43 1876, X41 1864, R52 1861, Z60t 2511, R52 1858, Z60t 2512, T43p 2687, T43 2686, X41 Tablet 1866, T43 1872, T43p 2669, X41 Tablet 1867, X41 1865, Z60t 2513, T43 2669, Z60m, T43 2668, T43 2678, Z60m 2532, R52 1850, R52 1847, R52 1859, Z60t 2514, R52 1860, T43 1874, R52 1848, X41 2525, T43 1871, T43 2679, T43p 2668, T43, T43 1875, T60p 1951-xxx, Z60m 2531, X41 2527, R51e 1845, Z60m 2530, X41 2526, Z60m 2529. 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.