No longer available.
We recommend the PoroTest 7 as replacement.
Internal Circular Brush Electrodes for Porosity Holiday Detectors, Disk & Spiral Wound Brushes
Available in diameters of 2" (50mm) to 20" (508mm)
Verification of porosity or holidays in the interior of pipelines or circular surfaces.
Note: Internal Brushes from 2" to 3" are Spiral wound. Internal Brushes from 4" up are Discs.