This Solaire Propane to Natural Gas Conversion Kit includes two main burner orifices. NOTE: Be sure to change the gas setting on the installed convertible regulator at the gas inlet of the grill and to perform the low fire adjustment on each main burner (see Care & Use Manual). For use with Solaire model 21G gas grills only. Will not work with Solaire model 21GXL gas grills. CONTENTS OF CONVERSION KIT MAY DIFFER FROM IMAGE SHOWN.