The Schwalbe Tube No.5 fits 18" (or 17") tires with a width of 32-47 mm and is used for children's bicycles, strollers, unicycles, trailers, and more. Due to their excellent manufacturing, Schwalbe tubes have proven themselves on the market for years. They are consistent in wall thickness and round in shape. Their precise configuration ensures durability at the seams. A comparative test showed that the Schwalbe tube maintains air pressure significantly longer than other tubes (the latter lost nearly twice as much air pressure as the Schwalbe tube in 30 days). A possible reason for this could be a lower butyl content in the other tubes. The special quality of Schwalbe tubes arises from the uniqueness of their rubber compound. To ensure this high quality, each Schwalbe tube is inflated and tested for at least 24 hours before it leaves the factory. **Features:** - Butyl rubber ensures double the air retention - 24-hour test for each tube - High elasticity allows coverage of many tire sizes per tube - Recycling process achieves a very good energy balance **Suitable for tire sizes including:** - 40-355 | 18 x 1.50 - 42-355 | 18 x 1.60 - 44-355 | 18 x 1.65 - 47-355 | 18 x 1.75 - 47-355 | 18 x 1.90 - 32-357 | 17 x 1 1/4 - 32-369 | 17 x 1 1/4 - 37-387 | 18 x 1 1/2 - 37-390 | 18 x 1 3/8 | 450 x 35A - 37-400 | 18 x 1 3/8 **Valves:** - AV = Auto, Schrader - DV = Dunlop, Blitz, German valve - SV = Sclaverand, Presta, French valve (40 mm) **Scope of delivery:** - 1 x Schwalbe Tube No.5 - including valve