AND 2 "LITTLE SHORTER " SHORT SECTIONS THAT WORK ON THE ENTRY WAYWHERE THE LADDERS GO IN-OUT (GUESSING ITS THIS WAY SO YOU CANT SEAL IT TOO TIGHT FOR DIESEL BURNER CO2). THESE ARE VERY RARE IN SURPLUS. I DO NOT SELL U. S SURPLUS OUTSIDE THE U. You no longer need to collect and pay it to the state...