| http://www.w3.org/ns/prov#value | - The body 25 portion of the sheath 20 may be made of any plastic material that is biocompatible in contact with tissue for a short period of time, including materials such as latex, silicone rubber, fluorocarbon polymers (Teflon), polyvinyl chloride, polyurethane, copolyester polymers such as polyethylene terephthalate (PET), thermoplastic rubbers, silicon-polycarbonate copolymers, a polyolefin suc
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