The product is a lot of 5 SK hynix DDR4-2400 PC4-19200 RDIMM ECC memory modules, each with a capacity of 8GB. These modules are designed for high-performance computing and feature error-correcting code (ECC) memory technology for enhanced reliability. With a total capacity of 40GB and a bus speed of DDR4-2400, these memory modules are suitable for demanding computing tasks such as gaming, multimedia editing, and professional software applications. The modules have a form factor of RDIMM, 288 pins, and are ideal for upgrading or replacing existing memory modules in desktop computers.