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Taiwanese Import Inner Tubes:These inner tubes are made of butyl rubber and are characterized by strong air tightness and resistance to heat and aging. Product dimensions: 71.1 cm - 700C x 35/43C, weight: 322 g/2 pack 48mm Presta valve: durable and wear-resistant. This Presta valve comes with an inflation protection cover that prevents breakage and deformation during use while preventing nozzle clogging and contamination. IMPORTANT NOTE Before purchasing new tubes, it is strongly recommended to thoroughly check the specifications of both the outer tire and inner tube to ensure compatibility and ensure the safety and performance of your rides. QUALITY ASSURANCE Every hose that leaves the factory is subjected to a 24-hour test. If you encounter any problems during use, please contact us immediately, and our customer service will answer your concerns within 24 hours. › See more product details