W5SWL Brand Premium Series Coax Connector UHF SO-239 Teflon & Silver 4 Hole Mount - by W5SWL Brand UHF SO-239 4 Hole Chassis Mount Teflon Insulator, Silver/Zinc Body, Silver Plated RF Pin Heavy Duty 4 Hole Mount Dave's Hobby Shop Premium Connector Series - by W5SWL by W5SWL Brand is Trademarked - Sold only by Dave's Hobby Shop and NO others. Premium Communications Connectors - not for Cable TV