The product is a set of 6 vintage 256KB SIMM RAM modules from NMB Technologies. Each module contains 256KB of memory and has a 30-pin design. Made in the United States, these modules are designed for compatibility with 386 and 286 computers, providing a total capacity of 1.5MB of memory. With a parity bit for error correction, these DRAM chips offer reliable performance for retro computing enthusiasts looking to expand their system's memory capacity.