For example, {HEAD ~ the internal diameter} of {TAIL ~ the tubular body} or cannula is normally in the range of 5 to 20 mm., or more, although other sizes such as larger oval shapes may be employed, if desired 
For example , { HEAD ~ the internal diameter } of { TAIL ~ the tubular body } or cannula is normally in the range of 5 to 20 mm . , or more , although other sizes such as larger oval shapes may be employed , if desired
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH