{HEAD ~ a bearing seal} for sealing the bearing assembly from {TAIL ~ an exterior side} of the wheel half, and 
{ HEAD ~ a bearing seal } for sealing the bearing assembly from { TAIL ~ an exterior side } of the wheel half , and
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH