A silicone rubber or {HEAD ~ a thermoplastic elastomer} in {TAIL ~ liquid form} may then be injected through a funnel associated with mould half B so as to form via casting the internal flexible membrane 
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A silicone rubber or { HEAD ~ a thermoplastic elastomer } in { TAIL ~ liquid form } may then be injected through a funnel associated with mould half B so as to form via casting the internal flexible membrane
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH