Schwalbe SV7

"The Schwalbe standard bicycle inner tube Nr. 7 is the ideal choice for bicycle tires in size 20 inches (ETRTO 40/62-406/428). This inner tube impresses with its above-average air resistance, which is due to the excellent material quality and the uniform wall thickness. These properties ensure high reliability, which is appreciated by millions of cyclists worldwide"
"Thanks to the excellent workmanship and robust construction, the SV7 inner tube is particularly durable and offers you the safety you need on your bike tours. Whether you are on your way to work or on a relaxed bike ride, you are well equipped with this inner tube."