... :2000 2) anode dia is 16mm~21mm, 21.3mm, 22mm, core dia is 2.0mm, 3.0mm, 3.4m 3) Reputation ... the chemical composition, length, thread(3/4NPT), anode dia and core dia of Bar-type anode that you need, we can ... machining according your demand. Main application: water heater, water container, pre-polarization of steel structure in seawater, gas ...