The Schwalbe DV 12 is a standard bicycle inner tube for 26-inch tires. Thanks to high-quality butyl and uniform wall thickness, this inner tube retains air for an above-average duration and offers reliable performance for daily use. Specifications: Wheel size: 26 inch ETRTO: 30/47-559/597 Valve type: DV (Dunlop) Valve length: 40 mm Inner tube type: Standard Material: Butyl Weight: approx. 140 g Schwalbe inner tube DV12, suitable for 26 inch, in ETRTO size 30/47-559/597. Equipped with a 40mm long Dutch/Dunlop valve. Schwalbe inner tubes are 100% fully recyclable. Schwalbe standard bicycle inner tube no. 12. For bicycle tires in sizes 26"/27.5" inch (ETRTO 30/47-559/597). Retains air for an above-average duration. Thanks to the best material quality and uniform wall thickness. Maximum reliability proven millions of times over.