Digital Antenna 8' Antenna Extender - White. All extenders mount standard 1"14 threaded mounts. Use a center brace when the combined length of your antenna and all extensions is more than 8'All Antenna Extenders Feature:Heavy duty fiberglass Stainless steel ferrules 1"14 threaded top and base High gloss urethane finishTapered ExtenderDimensions: 8' - 1.5" O.D.Use center brace Specifications for Digital Antenna 549-EW-S 8' Antenna Extender: Manufacturer: Digital Antenna Color: White Fabric/Material: Fiberglass Features of Digital Antenna 549-EW-S 8' Antenna Extender Construction: Fiberglass Mounting Style: 1in.-14 Thread Package Contents: Digital Antenna 549-EW-S 8' Antenna Extender Digital Antenna 549-EW-S: 549-EW-S 8' Antenna Extender - White