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Bicycle Valve + Sealant Dimension:27.5 x 1.75 / 2.25 33mm Durable Material Made from butyl, butyl rubber is airtight and is used in many applications that require an airtight and resilient rubber.
Bicycle Valve + Sealant Dimension:27.5 x 1.75 / 2.25 33mm Durable Material Made from butyl, butyl rubber is airtight and is used in many applications that require an airtight and resilient rubber.