A small assembly of standard or manufacturing parts that provides support Using Mylar to the panel is called a Support unit.
Mylar which is used as a support is called Support Mylar. One support unit can consist of one to multiple numbers of Support mylars. You can see a sample support unit in the given picture for reference.
![](https://biwfixture.com/wp-content/uploads/2022/05/SUPPORT-UNIT-1-1024x644.jpg)
In this unit, as you can see there are two support mylars. out of them, one is having one direction shimming and another is mounted with the help of an L block, which is providing two-way shimming to the mylar. Shape of the unit and parts depends upon the requirement of that tooling station.