This is a 2 inlet to 4 inlet conversion kit for Nortel 'Piggyback' style burners including the Midrange Plus, Major, and Red Max burners. A kit will contain two oxygen nozzles, 2 propane nozzles, 1 valve mounting bracket, and one set of instructions. Details for installation should be included in each kit if they are not please contact us so that we can provide it via electronic document.