The grommet 66 provides bearing surface made of {HEAD ~ a smooth, low friction material}, such as {TAIL ~ nylon} 
such as
The grommet 66 provides bearing surface made of { HEAD ~ a smooth , low friction material } , such as { TAIL ~ nylon }
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL