Interval type-2 fuzzy sets (IT2 FS) play an important part in dealing with uncertain applications. However. how to measure the uncertainty of IT2 FS is still an open issue. The specific objective of this study is to present a new entropy named fuzzy belief entropy to solve the problem based on the relation among IT2 FS. https://www.bekindtopets.com/quick-find-ABC-Storm-Fabric-p18939-flash-buy/