... 6", 8", 10",CASE MATERIAL:Steel case, steel black case, steel chrome plated case, steel gold plated case,brass polished case, all this can take ... 6", 8", 10",CASE MATERIAL:Steel case, steel black case, steel chrome plated case, steel gold plated case,brass polished case, all this can take ... .5%,1% accuracy, recalibrators,restrictors, special connections and more. Back Connection Steel Case Gauge 4Z2