1/2" direct ignition dual automatic combination valve, 24vac, two stage, standard opening, 1.7"wc low; 3.5"wc high regulator setting, 20-200 cfh capacity, 1/2# pressure rating, 1/8" pressure tapping with plug, for use with hot surface and direct spark systems, one 1/2"x3/8" reducer bushing, lp conversion kit