The cap is tapered in shape, having a wide opening at the end which connects to the cylinder so as to minimize the risk of {HEAD ~ contact} with {TAIL ~ the needle} when the cap is positioned on the cylinder 
with
The cap is tapered in shape , having a wide opening at the end which connects to the cylinder so as to minimize the risk of { HEAD ~ contact } with { TAIL ~ the needle } when the cap is positioned on the cylinder
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 HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH