Neither. They are/it is a retrofitted oxygen tank. Much cheaper than the PT tanks. It really isn't as big as it looks. I got the idea seeing the old folks wheeling them around the casinos.
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Charlie
Sensitivity is important in any relationship... "I don't like country music, but I don't mean to denigrate those who do. And for the people who like country music, denigrate means 'put down.'" --Bob Newhart
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