VHF 4' QuickConnect 3dB for QCM Series MountsQuickConnect antennas stem from the popularity of the quick connecting feature on Shakespeare's high-end Phase III marine antennas, the QuickConnect product line brings you the ease of connecting and disconnecting your marine antenna in a more affordable line-up.Features: QuickConnect System - Screw or unscrew the antenna to disconnect or connect; Splash Protection Cap - Protects the connector on the mount when the antenna is disconnected; Centerpin PL-259 Connector - An easy crimp-on connector; Base connector included for use with QuickConnect mounts only; Single Section antennas with VSWR of