The coax used in this pigtail is 100 grade coax. Heat shrink is used on the connectors to provide strain relief. Our radio pigtails are made from the highest quality products available. All cable assemblies are 100% tested electrically for continuity as a standard procedure, we also test our cable assemblies with industry leading tests that ensure optimum quality at high frequency. Our calibration system is traceable to the National Institute of Standards and Technology. Our Quality Assurance and Inspection system is certified to MIL-I-45208. Our connectors are manufactured in certified ISO-9001 facilities. Our cables are second to none and we guarantee it.