{HEAD ~ A resilient vinyl bumper insert} is formed with T shaped in section projections which interlock in the outer grooves of the channel thereby securing {TAIL ~ the bumper} to the channel 
{ HEAD ~ A resilient vinyl bumper insert } is formed with T shaped in section projections which interlock in the outer grooves of the channel thereby securing { TAIL ~ the bumper } to the channel
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH