Low Working Pressure Max 1/2 PSI(65mbar), & tested Main Control Valve In & Out with 3/8inch Male Flare thread Length of Thermocoupler 600mm Head Tip M8x1 (This is Low pressure control valve max rating BTU 50000) Platic Black Bakelite Knob Diameter 38mm and "D" Insert for Valve 6.0-6.1mm Suitable for Low Pressure Repair Control System for Grill, Fire Pit, Fireplace & Heater (max BTU rating: 50000 working pressure 65mbar) Keep The Thermocoupler to be Heated and Push the Valve around 5-10s Then Release Hand (if Flame stops, Ajust the location of Thermocouple tip) Specification parameters: Air thread: 5/8-18UNF (3/8inch Flare) Valve shaft size: 6.1mm Adapter knob: 6.0-6.1mm core Thermocouple: M8x1 Length 600mm Complete accessories for ovens, heaters, furnaces and other gas appliances Material: Metal colour: As shown Package Contents: 1 x Propane Gas Fireplace Safety Control Valve Kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.