{HEAD ~ The geometry} of the circumferential ridge or groove can optionally be modified to increase or decrease {TAIL ~ the amount} of force required to effect insertion or removal of the ferrule inside the cavity 
modified to increase
{ HEAD ~ The geometry } of the circumferential ridge or groove can optionally be modified to increase or decrease { TAIL ~ the amount } of force required to effect insertion or removal of the ferrule inside the cavity
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH REL REL REL OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH