Mechanically cladded copper coated grounding rod is made when electrolytic grade 99.9% copper tube with wall thickness of 0.25(250 microns) ks cladded to alow carbon steel rod. Rod Size "S"LengthProd Code. 12 1200 (4 ft) 1800 (6 ft) 2400 (8 ft) HCR 1412 HCR 1418 HCR 1424 14 1200 (4 ft) 1800 (6 ft) 2400 (8 ft) HCR 112 HCR 118 HCR 124 16 1200 (4 ft) 1800 (6 ft) 2400 (8 ft) 3000 (10 ft) HCR 312 HCR 318 HCR 324 HCR 330 19 1200 (4 ft) 1800 (6 ft) 2400 (8 ft) 3000 (0 ft) HCR 412 HCR 418 HCR 424 HCR 430