Schwalbe SV4

"The Schwalbe Standard bicycle inner tube Nr. 4, known as SV4, is the ideal choice for cyclists who value reliability and durability. This high-quality bicycle inner tube is specially designed for tires in sizes 16" and 18" Inch (ETRTO 28/37-340/355) designed. Thanks to its above-average air tightness, the inner tube remains inflated and ready to ride for longer, which means less maintenance and more riding fun"
"The SV4's outstanding material quality and consistent wall thickness are key to the high reliability that has been proven in millions of applications worldwide. Whether you are riding on smooth roads or uneven paths, this tube offers the best performance and protection against punctures."
"Schwalbe is known for its innovative technologies and high standards, which are reflected in every one of its products. The SV4 is no exception, providing cyclists with the confidence they need to enjoy every ride without worrying about sudden air loss."