{HEAD ~ The device} 1 wherein {TAIL ~ the outer encapsulating coat} is of a rubber material 
wherein
{ HEAD ~ The device } 1 wherein { TAIL ~ the outer encapsulating coat } is of a rubber material
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH