Please note, there is a difference in these flavors and in Lorann type oil concentrates.  This IS NOT as powerful as the oils.  The reason for this is they are not a thick lorann's oil based.  They are the waterish  based flavor concentrates that our factories use to produce the flavors we normally get in our eliquids.  These are really for bringing down a nic strength without losing the flavor that is normal from cutting with just straight PG or VG.  This means that unlike lorann's you'll need more than a drop or two for your flavoring when mixing it down yourself.  All flavorings are made without Nicotine.  These are mainly to be used to cut down the nic content in premixed bottles without losing taste.  Warning:  these will not recrate the flavor of a premixed for DIY purposes.