Gas components replacement of gas safety valve flame failure control Suitable for only GARDENSUN Brand Old Heaters with Orifice Panel Made of Brass and gas valve certified Nozzle Orifice Size 2.0mm 0.079" Easy Operate the flame by control the spindle shaft The gas valve is only suitable for the model of old design of GARDENSUN outdoor patio heaters, if you want to connnect other model number of heater, please compare the threads and height of the valve carefully