The product is a lot of 4 Samsung 16GB DDR3 2Rx4 M393B2G70BH0-CK0 ECC REG server RAM modules. These modules have a form factor of RDIMM and are specifically ECC RDIMM type, designed for servers in enterprise networking setups. With a capacity of 16GB per module, this RAM is reliable and high-quality, ideal for enhancing the performance and efficiency of server systems. The Samsung brand ensures durability and top-notch performance for your server memory needs.