Attaches to propane gas tanks with 58 pol type valve g38 19 lh bsp male gas hose connector ideal for roofing burners blowtorches ring burners boiling rings commercial bbqs gas space heaters and many other gas appliances with variable gas pressures operating pressure range 500 4000mbar max flow rate 8kgh use with silverline gas bottle spanner 753123 or other 30mm af spanner