MATERIAL: The fire pit gas control valve kit is made of brass and plastic for durable use. Not OEM but fits OEM Standards.APPLICATION: The kit is suitable for low pressure repair control system for Gas Grill, Heater, Fire Pit, & Fireplace.HOW TO USE: Fix the valve on a plate or board of your grill or fire pit by the head screw and flange. Connect your inlet and outlet hose on inlet and outlet side. Fix the thermocouple nut M8 on the valve end tightly. Connect thermocouple and end thread well. Open gas by correct size knob and push your valve around 5-10s till the thermocouple head is heated enough. Release your hand and it works properly. If the gas valve shut off again when you release hand, then please check.SIZE: 750 mm thermocouple with M8*1 threaded head. Bakelite knob OD 38mm, D shaft 6.1mm.AFTER SALES SERVICE: The Propane Fire Pit Kit Replacement Part completed with a One-year Warranty. Should be there any question, please feel free to .