Measurement is inside diameter.
Please note that while we do offer this product, we advise AGAINST using it. Kinkfree is notorious for being a difficult fit on some fittings. We cannot guarantee perfect fit and no returns will be accepted. Additionally, it has a much shorter lifespan than the other tubing we offer.
Tubing uses a mechanical fit (slips onto barbed fittings) and is secured with hose clamps.
Questions about the Kinkfree Tubing - 1-1/4 inch - 100' Roll?
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