The product is a lot of 25 Samsung DDR3 SDRAM memory modules, each with a capacity of 4GB. These 1Rx8 modules are fully buffered and have a bus speed of PC3-12800 (DDR3-1600). Each module has 204 pins and comes with a 1-month manufacturer warranty. The memory modules are in SO-DIMM form factor and are suitable for enhancing the memory capacity of laptops. Made in the United States, this product is ideal for computer enthusiasts looking to upgrade their laptop's memory capacity.