I'm working up a demo model of a special purpose pump (sorry I can't be
specific about its' function). and need to find some appx 3 inch dia X 1/4W
acryllic tube. The ID needs to be round and smooth enough for a sliding
O-ring seal,similar to a hydraulic cyl. Pressure will be low, about 20 psi.
Does anyone know of any suppliers for a tube that fit the need?

Thanks

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J Miller