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Knowledge Base : inner tube
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How does the lid stay on a 3 piece telescope tube?
Three-piece telescope tubes have a vacuum effect as a result of the top and base components fitting the inner tube snugly. When the canister is turned upside down, the lid does not fall off right away
What's the crush strength of a 3" ID x 24" usable x .060 mailing tube?
Unlike corrugated boxes, spiral paper tubes do not have industry standard crush strengths. Paper tubes with thicker walls are stronger than paper tubes with thinner walls.