{HEAD ~ The hollow, vinyl plastic ribs} are inflated with air through an air valve located in {TAIL ~ the foundation rib} 
{ HEAD ~ The hollow , vinyl plastic ribs } are inflated with air through an air valve located in { TAIL ~ the foundation rib }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL