This product is a lot of 6 8GB DDR4-2133MHz UDIMM RAM modules for the AX42133N15B/8G Memory. Each module has a capacity of 8GB and a single rank design. The memory features non-ECC unbuffered DIMM technology, with a bus speed of DDR4-2133 (PC4-17000). Made by MB, the modules are equivalent to the Axiom AX42133N15B/8G model and have a total capacity of 48GB. With a form factor of UDIMM and 288 pins, these DDR4 SDRAM modules are ideal for boosting the memory capacity of computers and improving performance.