The apparatus 30, wherein said diameter reduces in {TAIL ~ size} in {HEAD ~ a direction} from said leading end to said trailing end 
The apparatus 30 , wherein said diameter reduces in { TAIL ~ size } in { HEAD ~ a direction } from said leading end to said trailing end
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH