The product is a pair of Hitachi HB56D13-6BV-7B 4MB PS/2 FPM RAM SIMMs, each with a capacity of 4 MB. These memory modules have a form factor of SIMM and a total capacity of 8 MB. They are designed for use in computers that require 72-pin SIMM memory modules, providing fast page mode random access memory for improved performance. With Hitachi's reputation for quality, these RAM modules are a reliable choice for enhancing the memory capacity of your computer system.