The inwardly facing surface comprises the means for simultaneously drawing the plurality of {TAIL ~ sleeves} through {HEAD ~ the duct} 
The inwardly facing surface comprises the means for simultaneously drawing the plurality of { TAIL ~ sleeves } through { HEAD ~ the duct }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD