Baldor-reliance motor, .25/.33hp,1750rpm,dc,d71d,3327p,tenv,f2 features: metric flange or c-face per iec standards bolt on non-metric base class f insulation tach adaptable except type 135s 20:1 constant torque speed range type 135s and 3300p motors are tenv, all others are tefc typical applications: scr drive motors for replacement on machinery requiring metirc mounting dimensions.