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