Jan 30, 2020 · customized size Ground protection mats 1.8mx 0.9m for civil Engineering ERITECH Facility Electrical Protection - ERITECH Lightning PPER BONDED GROUND RODS: nductor Size: Rod Size 1/2” (12.7 mm) Rod Size 5/8" (14.2 mm) Rod Size 3/4" (17.2 mm) Part # Provides a direct ground resistance reading of 0.1 to 1200 Oh;