This material is sufficiently firm enough to maintain its shape but sufficiently soft enough to provide for {HEAD ~ a sound insulation} between {TAIL ~ the sleeve} 12 and a pipe 34 
between
This material is sufficiently firm enough to maintain its shape but sufficiently soft enough to provide for { HEAD ~ a sound insulation } between { TAIL ~ the sleeve } 12 and a pipe 34
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH