Don't let it end like this. Tell them I said something.
- Last words of Pancho Villa (1877-1923)
One of the symptoms of an approaching nervous breakdown is the belief that one's work is terribly important.
- Bertrand Russell (1872-1970)

“Duties” explained.
No matter the item’s physical size, its wall thickness (and therefore its weight!) will increase as we progress up the scale of Light – Medium – Heavy – Extra Heavy – and, Severe Heavy Duties.
The main issue to remember is that a specific duty, say Heavy Duty, is a different wall thickness on smaller items than on larger items. The wall thicknesses on every item and every duty are published to ease your decision.
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