heat shrink bands: 1.Economical and easy to use, 2.Can ... secure the lid, 3.TD50% shrinkage,MD1~3% shrinkage, heat shrink bands,PVC Shrink Preform,also known as: Preforms,Pre-forms,Preformed ... Shrink Bands,Peformed bands,Pre-form Bands,Shrink Preformed Bands,cut shrink bands, custom cut bands, ... preforms can also be supplied. A perforation is optional. heat shrink bands