a tapered wall extending from {TAIL ~ the bottom end} to the top end, said tapered wall having {HEAD ~ an outer surface} and an inner surface 
a tapered wall extending from { TAIL ~ the bottom end } to the top end , said tapered wall having { HEAD ~ an outer surface } and an inner surface
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH