The Schwalbe Tube 5 is a reliable standard inner tube for 18-inch bicycle tires. Thanks to the high-quality butyl rubber composition and even wall thickness, this inner tube retains air for an above-average period. The proven Schwalbe quality ensures maximum reliability, as has been proven millions of times in practice. Specifications: Brand: Schwalbe Model: Tube 5 Inner tube type: Standard Material: Butyl Wheel size (inch): 18 ETRTO: 32/47-355 / 32-369 / 37-390 / 37-400 Valve type: DV (Dunlop) Valve length: 32 mm Weight: 95 g Article number: 5 Schwalbe standard inner tube no. 5. For bicycle tires in size 18" inch (ETRTO 32/47-355/400). Retain air for an above-average period. Thanks to the best material quality and uniform wall thickness. Maximum reliability that has been proven millions of times.