The DeFelsko HHDCOUPLER Replacement Spring Couplers is thread onto rolling springs and attach to the Spring Connector for use with the DeFelsko HHDKIT PosiTest HHD Kit High Voltage Holiday Detector and DeFelsko HHDKITB PosiTest HHD Basic Kit High Voltage Holiday Detector.

Please Note: All rolling spring electrodes include two pre-installed spring couplers. Replacement spring couplers are not intended for connecting multiple rolling spring electrodes together.