Many customers just sent us item No. when they sent us inquiry . It is so hard for us to comfirm the right heat shrink tubing they need . 

The item No. for one kind of heat shrink tubing is not same in different company . 

In our company , thin wall heat shrink tubing is HHST , but in another company it can be HST . 

So you should send us the date sheet , it is so important to know the wall thickness , heat shrink ratio , operating temperature , and material . 

Thin wall heat shrink tubing , medium wall heat shrink tubing and heavy wall heat shrink tubing are all made of PE . If you just tell us that you are searching heat shrink tubing made of PE , we can not comfirm right product . The difference for the 3 items is wall thickness and application scenario . 

So , please send us your inquiry with the date sheet , or you can tell us the application scenario . Thanks .