A U fastener base provided at {HEAD ~ the front} of {TAIL ~ the seat bag} is composed of a U frame and a resilient rubber ring 
of
A U fastener base provided at { HEAD ~ the front } of { TAIL ~ the seat bag } is composed of a U frame and a resilient rubber ring
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH