Micron part number MT8LSDT3264AY-13ED2 is a 256MB 133MHz DRAM module and perfect for expanding the memory of your computer. This is premium Pb free memory that is made in the UK. Specs: PC100 and PC133 compliant, 168-pin, dual in-line memory module (DIMM), utilizes 133MHz SDRAM components, unbuffered, 256MB (32 Meg x 64) Single +3.3V ±0.3V power supply, fully synchronous, gold edge contacts. Please verify that this is the proper memory for your computer before ordering (newer computers use a different type of memory). Sorry, no returns on computer memory. Brand new.