This is one place where it pays to be cheap.) Fluoroelastomer bands are often advertised as being made of “FKM rubber,” like this one that says in the product description: “FKM Rubber (Not ...

Specialized materials such as FKM (fluorelastomer), FFKM (perfluoroelastomer) and EPDM (ethylene propylene elastomer) are tailored to meet the demands of various industries, including the medical ...