How much material is fluoroelastomer? What is the price of fluoroelastomer?

Fluoroelastomer FKM is a synthetic polymer elastomer containing fluorine atoms on the carbon atoms of the main chain or side chain. The earliest fluoroelastomer for the United States in 1948 DuPont company trial production of poly-2-fluoro-1.3-butadiene and its **** polymer with styrene, propylene, etc., but the performance is not more than chloroprene rubber, butyl rubber is outstanding, and expensive, no practical industrial value. the late 50's, the United States, the Thiokol company has developed a low-temperature good, strong oxidants (N2O4) resistance to the Binary nitrosofluoroelastomer, fluoroelastomer began to enter the practical industrial applications. Since then, with technological progress, a variety of new types of fluoroelastomers have been developed.