| http://www.w3.org/ns/prov#value | - In embodiments, the core 214 is comprised of aluminum, or the like; the inner layer 216 is comprised of an elastomeric material, such as silicone, or the like; and the outer layer 218 is comprised of a fluoroelastomer sold under the trademark Viton??? by DuPont Performance Elastomers, L.L.C., or the like.
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