【SUITABLE GAS】natural gas, gaseous propane, air, other non-corrosive gases. 【DURABLE】CASE is made through die-casting by using the high-quality ADC12 aluminum alley.Valve and valve seat made of advanced PF synthetic resin. 【SAFE】The diaphragm is made of top quality material has been tested 3 million bending test. 【CONNECTION】3/4"NPT.1 pulse per 1 cube ft. 【EASY TO USE】 Readout is in cubic feet,Remote Readable. Roastove Gas Meter,Natural Gas SUBMETER,with 3/4" thread and Pulse Output