This is the old nozzle removed, Now we come to a problem that gets home owners in trouble, getting a replacement nozzle for your oil burner, it must be the exact nozzle that you removed, that may not be the one the boiler plate calls for, if you change the type of nozzle in anyway the boiler will need to be setup for the different nozzle this requires special tools. also the wrong nozzle can cause a serous problem.