The carbon killer is for extreme baked on carbon cleaning.It dissolves carbon and lead on contact and is designed for soaking metal parts with baked on carbon.*note: carbon killer is for cleaning bores and internal metal gun parts by soaking them.It is an aggressive cleaner and should not be used to clean the outside of your gun.It can damage and even remove some finishes.Type: CleanerSize: 4 ozQuantity: 1 BottleProtects: Against Carbon Build UpEco-friendly: Non-Toxic, BiodegradableHazair: Yes