A double walled configuration of the sleeve can be provided in the sections incorporating {TAIL ~ the transmitter} and {HEAD ~ the receiver} 
A double walled configuration of the sleeve can be provided in the sections incorporating { TAIL ~ the transmitter } and { HEAD ~ the receiver }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD