Schwalbe DV4

"The Schwalbe standard bicycle inner tube DV4 is the perfect choice for cyclists who value reliability and durability. This inner tube is specially designed for bicycle tires in the sizes 16" and 18" Inch (ETRTO 28/37-340/355) and offers above-average airtightness. This is achieved by the excellent material quality and the uniform wall thickness, which ensure consistently high performance."
"Schwalbe is known for its millionfold proven quality, and the DV4 tube is no exception. It guarantees the highest level of reliability, giving you a safe and carefree riding experience. Whether you commute to work every day or plan longer tours at the weekendu2013 with this inner tube you are always well equippedu2013."
"The optimized material mixture ensures that the tube retains its shape and function even under changing temperatures and different loads. Put your trust in Schwalbe's expertise and opt for a bicycle inner tube that won't let you down."