The Crucial Memory RAM 32 GB Kit consists of two 16 GB DDR3 1866 RDIMM modules, designed for MAC computers. These memory sticks provide a total capacity of 32 GB, with each stick offering 16 GB of capacity. The DDR3 technology ensures fast bus speeds of PC3-14900 (DDR3-1866), enhancing the performance and efficiency of the computer system. With the Crucial brand reputation for reliability and quality, this RAM kit is a dependable choice for upgrading your computer's memory capacity.