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Continue to ChatInner Tube - 3.50-4, 4.10/3.50-4, Angled Valve Stem - 40P2060 - PBC3525F1 - https://www.pocketbikecanada.ca/com-virtuemart/parts-catalog/tires-rims-tubes/inner-tube-3-50-4-4-10-3-50-4-angled-valve-stem-pbc3203yt