The product is a pair of 8GB DDR5 UDIMM memory modules, for a total of 16GB, with model number MTC4C10163S1UC48BA1. This memory module is tested to ensure its quality and performance, making it suitable for upgrading or replacing existing memory modules in computers. With a high speed of 4800 PC5-38400, these DDR5 modules offer fast data transfer rates for improved system performance and efficiency. Ideal for collectors or enthusiasts looking to enhance their computing experience.