Examples of jelly like {HEAD ~ materials} suitable for being used as water blocking filler inside the above buffer tubes are {TAIL ~ compound K550®} or H55®  
are
Examples of jelly like { HEAD ~ materials } suitable for being used as water blocking filler inside the above buffer tubes are { TAIL ~ compound K550 ® } or H55 ®
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH