The Honeywell VR4305M4532 is a direct ignition dual automatic combination gas valve with a standard opening that operates at 120V and 60 Hz.  This single-stage device has a 3/4" inlet X 3/4" outlet connection that can handle 30,000 to 415,000 Btu.  UL and CSA Listed.

The dual automatic gas valve consists of a solenoid-operated valve that opens when the thermostat is on heat mode; closes when heat is off and a diaphragm-operated valve that opens when under the control of a regulator; closes when the gas or power supply is interrupted.

The VR4305M4532 is suitable for hot surface ignition (HSI), direct spark ignition (DSI), or gas-fired appliances.  Compatible with natural gas type and can be with LP gas by using the conversion kit that comes with it.  This device also includes a manual valve, pressure regulator, conduit cover, and two automatic operators.