One is new sealed & one open used.

Enhance your laptop's performance with this high-quality 4GB PC3-10600 DDR3 1333MHz 10600S SODIMM Memory RAM. It is compatible with various laptop brands like Dell, HP-Compaq, Apple, Intel, IBM-Lenovo, Toshiba, Acer, Asus, and Sony. This DDR3 SDRAM has a bus speed of PC3-10600 (DDR3-1333) and features non-ECC unbuffered memory for faster data transfer.

The memory has a total capacity of 4GB and is sold as a single module unit with 204 pins. It has a compact form factor allowing it to fit perfectly in your laptop's memory slot. This memory module comes with a lifetime manufacturer warranty ensuring long-lasting and reliable performance.