The PCWI COIL1160 Circular Pipeline Coil Electrode 46" / 1160mm Diameter # 0202 CPCE-0202 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.