Compatible with the HARRIS cutting nozzle tips Acetylene cutting nozzle tip:Propane cutting nozzle tip:Gouging nozzle tip: High speed nozzle tip: Heating nozzle tip: 2290-1H, 2H, 3H, 4H, 5H Natural gas heating nozzle: 2290HPM-1 2290HPM-2 2290HPM-3 2290HPM-4 2290HPM-5