Two pieces induction sealing liners are - after sealing, there will be cardboard separated from aluminum foil, cardboard inside the cover, aluminum foil and quality seal

One pieces induction sealing liners are - directly contact with the bottle after sealing, there is no cardboard problem

The induction sealing liners are mainly determined by the gap between the bottle and the cap. If the gap is too large, Two pieces induction sealing liners is recommended. If the gap is small, it is recommended to use a One pieces induction sealing liners.