"Will it fir an mCig vape pen ?"
Hi there!
The Select Relax Vape pen is a disposable vaporizer and has the battery included. It is an all-in-one pen and not intended to be used on an mCig vape pen. Once you have finished the oil, you can recycle or discard it appropriately.
I hope this information helps! ๐
VeronicaB