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