The Schwalbe DV 1 is a standard bicycle inner tube for 12-inch tires. Thanks to high-quality butyl and a uniform wall thickness, this inner tube retains air for an above-average duration and offers reliable performance for daily use. Specifications: Wheel size: 12 inch ETRTO: 47/62-203 Valve type: DV (Dunlop) Valve length: 32 mm Inner tube type: Standard Material: Butyl Weight: approx. 80 g A Schwalbe inner tube retains air pressure significantly longer. The quality of the components and the purity of the rubber compound are distinctive for the quality of the inner tube. All inner tubes are placed in a mold and inflated before vulcanization. Only this procedure ensures uniform wall thickness and long-lasting airtightness. With reinforced valve base for protection against the dreaded valve tear-off!