DOUBLE CHECK YOUR OHMS ON THE SIDE OF CERAMIC ON YOUR RHEOSTAT. There are two versions for the 250 NT, 10 ohm and 14 ohm, This one is 10 ohms. BRAND NEW! Miller Welder Rheostat, 100 Watt, 10 Ohm, 205839 & Supersedes 117243, Bobcat 225G 225G Plus, 225D, 225D Plus, 225Nt Prior to Lc191442