100-Pack RJ45 Modular plug for use on Solid Conductor Cat5e cable, N022-01K-GY, or, Tripp Lite Zero-Skew cable, P524-01K ( Can be used for Stranded wire as well ). Contacts are 50 micron Gold for optimum signal transmission. For stranded conductor Cat5e RJ45s, see Tripp Lite N031-050.