Make sure the inflatable tubes are made from HYPALON because if they are made from other plastic ( PVC for example ) , it won't last long .

Those you see getting used by the defence forces are made from HYPALON of military grade which is almost twice as thick as those used for recreational purposes while the commecial grade is somewhere in between .

Jon .

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It's not what you don't know that gets you into troubles , it's what you know for sure that ain't so . Mark Twain .