The product is a set of two 4GB DDR3-1600 memory modules , with a total capacity of 8GB. These DIMM modules have a form factor of DIMM and a pin count of 240. The memory modules are designed for high performance with a bus speed of PC3-12800 (DDR3-1600) and feature ECC memory for error correction. Additionally, the product includes free shipping. Ideal for enhancing the performance and capacity of a computer system, these memory modules are a reliable choice for improving overall system efficiency. 1 CRUCIAL AND 1 SHARETRONIC MODULE PER PHOTOS. FREE SHIPPING