The PCWI COIL1210 Circular Pipeline Coil Electrode 48" / 1210mm Diameter # 0203 CPCE-0203 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.