Big Fink polymer test stations are a suitable alternative to distribution boxes in cathodic protection systems. Bigfinks of this company have the ability to use shunt and variable resistance. The components of these test stations are: support pipes (with diameters of 0.75 to 3.5 inches and 1.5 meters long), series of test stations (including cover, transparent board, gasket). The polymer used in the body of this test station has a very high resistance to weather changes, sunlight (UV rays) and harsh environmental conditions and offers very good dimensional stability.