Smok TFV12 Replacement Glass 3 pack ! You never know when you might need it. As the saying goes better to have and not need, than need and not have. This pack comes with three individual glass replacement pieces This is a much better alternative than the alternative of having to purchase an entire new tank. Pyrex glass replacement for the Smok TFV12 tank is a great accessory for all the clumsy ones out there!