What is the diaphragm material for the 9013 Type F pressure switches only?

Issue:
What is the diaphragm material for the  9013 Type F pressure switches only?

Product Line:
Digest 177 Section 22 : Pressure, Vacuum and Float switches

Environment:
North American Products

Cause:
Needs the diaphragm material for the  9013 Type F pressure switches only.

Resolution:
Arnitel EL-550, natural color (white).

Released for: Schneider Electric Canada