The 12 Neutrik D-NE8FDP Ethercon RJ45 Cat5 Panel Jack is a silver modular in-line coupler designed for Ethernet crossover connections. With a size of 430 x 330 x 150, this unit features a Neutrik RJ45 port female connector B and ethercon connector A. Manufactured by Neutrik in the United Kingdom, this unit is a reliable and high-quality option for various networking needs. Tested with 3 working and 4 broken units, this product is a versatile and essential component for computer and networking setups for audio.