The PCWI COIL1320 Circular Pipeline Coil Electrode 52" / 1320mm Diameter # 0205 CPCE-0205 is ideal for verification of porosity or holidays on pipelines or circular surfaces. This PCWI circular Pipeline Coil is suitable for all High Voltage Porosity detectors, holiday detectors, spark testers and jeepers. The coil electrodes are shipped complete with ball bearing ends.