The product is a lot of 4 Finisar FTRJ1321P1BTL SFP modules, designed for use in enterprise networking setups. These modules operate at 1310nm wavelength and are compliant with 21CFR1040.10 regulations. With SFP network ports, these modules are ideal for high-speed data transmission and can be easily integrated into existing switch or hub systems for enhanced performance and reliability. Whether used for servers or networking equipment, these Finisar modules offer a reliable and efficient solution for expanding network capabilities.