This 20" bike inner tube is made from butyl rubber and features a 48mm presta/french valve.
Duro tyre company has a dedication to safety, long lasting performance and reliability which is summed up in their name. "Durability" is the guiding principle behind everything they do.
Since 1945 they have gained an in-depth understanding of how to manufacture quality tyres and tubes. That expertise, along with persistent R&D efforts, can be found in every DURO product providing maximum performance and superior handling while strictly adhering to worldwide standards and excellent quality.