The product is a lot of 2 OWC 16GB DDR4-2666 SODIMM RAM modules, each with a capacity of 8GB. The modules have a total of 16GB of memory capacity and a bus speed of DDR4-2666. They are designed for computers and laptops that use SO-DIMM memory modules, and are a reliable choice for upgrading or replacing existing memory modules to improve system performance. With the OWC brand known for quality and performance, these DDR4 SDRAM modules are a good option for enhancing the speed and efficiency of your computer system.