Standard N male connectors for use with LMR-240, RFC240 or RG-8/X Coax cable. They are used for a wide variety of connections to terminate coax at a N female jack. The body plating is Silver, the center pin is Gold and the dielectric is Teflon. Center pin attachment is a crimp type (.068 crimp) , and outer ring is crimp (.255 crimp tool needed).