Honeywell 1/2″ continuous pilot dual automatic combination valve

Honeywell 1/2″ continuous pilot dual automatic combination valve, 24vac, standard opening, 3.5″ wc, 20000-2000000 btu capacity, 1/2# pressure rating, 1/8″ pressure tapping with plug, for use in gas fired and standing pilot appliances, includes lp conversion kit, one 3/4″ straight flange, one 1/2″x3/8″ reducer bushing