The Continental TPU inner tube is lightweight, compact, and reduces rolling resistance. TPU is a combination of plastic and silicone material, making it both strong and flexible and long-lasting. The high-quality TPU, consisting of 7 sealed layers, maximizes airtightness and durability. The inner tubes are uncolored to ensure maximum quality and prevent finishing imperfections. The valve base has a slightly conical shape to improve fit on the rim and reduce unwanted movement, while the valve has an internal thread to allow the use of valve extenders or a replaceable valve core.Lightweight inner tube made of Thermoplastic Polyurethane (TPU)ETRTO size: 25-622 > 35-622Very light: 35 gramsLow rolling resistanceSmall volumeEasy to repair (repair kit included)Continental Article number: 738688 EAN code: 4019238326574 Supplier number: 0182711 Retail packaging: Yes