The product is a lot of 5 Nanya DDR2 2GB ECC PC2-5300 667Mhz server memory modules. These DIMM modules have a total capacity of 10GB, with each module having a capacity of 2GB. They are designed for servers and feature ECC memory, which is error-correcting code memory that helps detect and correct errors during data transfer. This memory is suitable for high-performance computing environments that require reliable and error-free memory support.