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